Who Called Me from Area Code 231?
Quick answerA 231 call usually comes from Muskegon or nearby communities, but caller ID can be spoofed, so a local-looking number isn’t proof. If there’s no voicemail, let it go: legitimate callers leave messages.
- No voicemail? Let it go. Real callers leave messages.
- Recognize the pattern? Check the number in the prefix lookup.
- Getting repeats? ActiveArmor® blocks and labels them automatically.
- Same prefix calling again? Compare it against this month’s most-reported 231 prefixes, right on this page.
- Curious who issued a number? Every 231 prefix belongs to a carrier — the registry names it.
Been targeted?Report the call at reportfraud.ftc.gov — reports feed the complaint data that powers spam blocking, including the board on this page. AT&T customers already have ActiveArmor® screening built in.
Most-reported 231 prefixes this month
PrefixReported patternReport volume
(231) 442-XXXXRobocall-heavy
(231) 790-XXXXRobocall-heavy
(231) 434-XXXXRobocall-heavy
(231) 427-XXXXRobocall-heavy
(231) 465-XXXXRobocall-heavy
337 unwanted-call reports naming 231 numbers in FTC Do Not Call complaint data, July 2–17, 2026. Consumer-reported and unverified.
Block spam calls in the 231, included with AT&T wireless
AT&T ActiveArmor® is the network-level security that screens the calls this page is about:
- Fraud calls blocked automatically on the network
- Suspected spam labeled before you answer
- Caller ID & custom call blocking in the free app
- Reverse number lookup (available with ActiveArmor Advanced security. Fee required.)
- Identity monitoring & identity theft insurance (available with ActiveArmor Advanced security. Fee required.)
Included with AT&T wireless plans. Requires compatible device/service and download of the AT&T ActiveArmor® app. Other terms & restrictions apply. May not detect all threats and may block wanted calls. Some features require Advanced mobile security ($7/mo.). See terms.
See how ActiveArmor worksIncluded with the free 30-day AT&T Wireless℠ trialTry AT&T Wireless℠ free for 30 daysDownload the AT&T app, activate a trial eSIM in minutes, and run our network side by side with your current service. No credit card, keep your number.
- 100GB of data plus 25GB hotspot
- Unlimited talk & text in the U.S., Canada and Mexico
- Texting from the U.S. to 200+ countries & territories
- Access to the AT&T 5G network
Offer details
Service good for 30 days. Data: Limited to 100GB of data and 25GB of hotspot data. No additional data is available after limit is reached. Video is limited to SD quality. Talk & Text: Includes unlimited talk & text within the U.S. and unlimited text from the U.S. to over 230 countries. Limits: One trial per user. An unlocked, dual eSIM iPhone is required. You’ll receive a trial phone number that belongs to AT&T and is not available to be ported to another carrier or otherwise retained. Trial plan features and details may differ from or be unavailable in other AT&T plans. U.S. only. All terms subject to change at any time.
Is Area Code 231 a Scam?
No. 231 is a legitimate Muskegon area code.
It’s carved from the 616 in 1999 and serves Muskegon and surrounding communities. But legitimacy of the code says nothing about any single call. Scammers spoof local numbers constantly.
The code is realSplit from the 616 in 1999; 572 assigned carrier prefixes serve it today.
Spoofing happens“Neighbor spoofing” fakes local numbers. No voicemail? Let it go.
Screening includedActiveArmor® labels and blocks suspected spam. Included with AT&T wireless plans.
Been targeted? Report it to the FTC at reportfraud.ftc.gov. Reports feed the complaint data that powers spam blocking.
Scam texts from area code 231 numbers
The most common area code 231 text scam is the “wrong number” opener: a friendly message that pretends to know you, then moves the chat to WhatsApp and eventually to an investment pitch. Scripts currently circulating:
- “U at home?” · “Are you busy tomorrow?” · “How are you doing?”
- Delivery-problem and job-offer texts that link out to a login page
Don’t reply. A response marks your number as live. Forward scam texts to 7726 (SPAM), and AT&T ActiveArmor® filters known senders automatically.
How number spoofing works in area code 231
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 231 number isn’t involved and usually has no idea. That’s why blocking one number rarely stops the calls.
- A call from a number almost identical to yours (same 231 and prefix) is “mirror spoofing.” A missed call from your own number is never worth returning.
- Strangers calling you back saying you called them? Your 231 number is being spoofed. It typically passes within days, and you don’t need a new number. Report it at reportfraud.ftc.gov.
- The caller-ID checkmark: AT&T verifies network calls (STIR/SHAKEN). A verified mark means the displayed number wasn’t faked. No mark doesn’t always mean scam, but treat it with more caution.
Spoofed or not, the rule holds: unexpected caller, no voicemail? Let it go.
231 Area Code Prefix & Carrier Lookup
The three digits after the area code identify the carrier a number was issued to. All 572 assigned 231 prefixes below are real, from the public numbering registry. Type to filter.
This isn’t a reverse phone lookup: no legitimate free service can tell you who owns a specific number. What a 231 prefix does show: the carrier that issued it, whether it’s wireless, landline or VoIP, and the community it belongs to, which is often enough to judge whether a call was worth returning.
572 prefixes · updated monthly
| Prefix | Carrier | Line type |
|---|---|---|
| 231-201 | AT&T Mobility | Wireless |
| 231-202 | AT&T Mobility | Wireless |
| 231-203 | AT&T Mobility | Wireless |
| 231-204 | Spok (paging) | Landline |
| 231-205 | Telnet Worldwide | Landline |
| 231-206 | T-Mobile (Omnipoint) | Landline |
| 231-207 | Telnet Worldwide | Landline |
| 231-208 | Telnet Worldwide | Landline |
| 231-209 | Telnet Worldwide | Landline |
| 231-210 | Onvoy (Sinch) | VoIP |
| 231-212 | Lumen (CenturyLink) | Landline |
| 231-213 | AT&T Midwest (Michigan Bell) | Landline |
| 231-214 | Spectrum (Charter IP) | Landline |
| 231-215 | Verizon Wireless | Wireless |
| 231-216 | Peerless Network | VoIP |
| 231-217 | Telnet Worldwide | Landline |
| 231-218 | T-Mobile (Omnipoint) | Landline |
| 231-219 | Telnet Worldwide | Landline |
| 231-220 | 123NET | Landline |
| 231-221 | Lumen (CenturyLink) | Landline |
| 231-222 | Lumen (Level 3) | VoIP |
| 231-223 | Ace Tel. Co. Of Michigan | Landline |
| 231-224 | Bandwidth.com | VoIP |
| 231-225 | Lumen (Level 3) | VoIP |
| 231-226 | Telnet Worldwide | Landline |
| 231-227 | Spectrum (Charter IP) | Landline |
| 231-228 | Brightspeed | Landline |
| 231-229 | Brightspeed | Landline |
| 231-230 | Telnet Worldwide | Landline |
| 231-232 | Telnet Worldwide | Landline |
| 231-233 | Verizon Wireless | Wireless |
| 231-234 | Spectrum (Charter IP) | Landline |
| 231-235 | Telnet Worldwide | Landline |
| 231-236 | Telnet Worldwide | Landline |
| 231-237 | AT&T Midwest (Michigan Bell) | Landline |
| 231-238 | AT&T Midwest (Michigan Bell) | Landline |
| 231-239 | Verizon Wireless | Wireless |
| 231-240 | Telnet Worldwide | Landline |
| 231-241 | Daystarr LLC dba Daystarr Communications | Landline |
| 231-242 | AT&T Midwest (Michigan Bell) | Landline |
| 231-243 | Telnet Worldwide | Landline |
| 231-244 | Lumen (CenturyLink) | Landline |
| 231-245 | AT&T Mobility | Wireless |
| 231-246 | Comcast (Xfinity Voice) | VoIP |
| 231-247 | Bandwidth.com | VoIP |
| 231-249 | Bandwidth.com | VoIP |
| 231-250 | Verizon Wireless | Wireless |
| 231-251 | Peerless Network | VoIP |
| 231-252 | Bandwidth.com | VoIP |
| 231-253 | T-Mobile (Omnipoint) | Landline |
| 231-254 | T-Mobile (Omnipoint) | Landline |
| 231-255 | Spok (paging) | Landline |
| 231-256 | AT&T Midwest (Michigan Bell) | Landline |
| 231-257 | Peninsula Fiber Network | Landline |
| 231-258 | AT&T Midwest (Michigan Bell) | Landline |
| 231-259 | Spectrum (Charter IP) | Landline |
| 231-260 | T-Mobile (Omnipoint) | Landline |
| 231-261 | Peninsula Fiber Network | Landline |
| 231-262 | Acd Telecom | Landline |
| 231-263 | Brightspeed | Landline |
| 231-264 | AT&T Midwest (Michigan Bell) | Landline |
| 231-265 | Spectrum (Charter IP) | Landline |
| 231-266 | AT&T Midwest (Michigan Bell) | Landline |
| 231-267 | AT&T Midwest (Michigan Bell) | Landline |
| 231-268 | Verizon Wireless | Wireless |
| 231-269 | Ace Tel. Co. Of Michigan | Landline |
| 231-270 | Onvoy (Sinch) | VoIP |
| 231-271 | Brightspeed | Landline |
| 231-272 | Onvoy (Sinch) | VoIP |
| 231-273 | Onvoy (Sinch) | VoIP |
| 231-274 | American Messaging (paging) | Landline |
| 231-275 | Brightspeed | Landline |
| 231-276 | AT&T Midwest (Michigan Bell) | Landline |
| 231-277 | Onvoy (Sinch) | VoIP |
| 231-278 | Onvoy Spectrum (Sinch) | VoIP |
| 231-279 | Lumen (Level 3) | VoIP |
| 231-280 | Onvoy (Sinch) | VoIP |
| 231-281 | AT&T Mobility | Wireless |
| 231-282 | AT&T Mobility | Wireless |
| 231-283 | Onvoy (Sinch) | VoIP |
| 231-284 | T-Mobile (Omnipoint) | Landline |
| 231-285 | T-Mobile (Omnipoint) | Landline |
| 231-286 | Verizon Wireless | Wireless |
| 231-287 | Verizon Wireless | Wireless |
| 231-288 | AT&T Mobility | Wireless |
| 231-289 | Bandwidth.com | VoIP |
| 231-290 | AT&T Mobility | Wireless |
| 231-291 | Telnet Worldwide | Landline |
| 231-292 | Spectrum (Charter IP) | Landline |
| 231-293 | Hd Carrier | Landline |
| 231-294 | Onvoy (Sinch) | VoIP |
| 231-295 | Spectrum (Charter IP) | Landline |
| 231-296 | Spectrum (Charter IP) | Landline |
| 231-297 | Onvoy (Sinch) | VoIP |
| 231-298 | Spectrum (Charter IP) | Landline |
| 231-299 | Metro by T-Mobile (MetroPCS) | Wireless |
| 231-300 | Onvoy (Sinch) | VoIP |
| 231-301 | Verizon Wireless | Wireless |
| 231-302 | Bandwidth.com | VoIP |
| 231-303 | AT&T (Teleport Communications) | Landline |
| 231-304 | Onvoy (Sinch) | VoIP |
| 231-305 | Telnet Worldwide | Landline |
| 231-306 | Telnet Worldwide | Landline |
| 231-307 | AT&T Mobility | Wireless |
| 231-308 | Telnet Worldwide | Landline |
| 231-309 | Telnet Worldwide | Landline |
| 231-310 | Onvoy (Sinch) | VoIP |
| 231-312 | Telnet Worldwide | Landline |
| 231-313 | AT&T Mobility | Wireless |
| 231-314 | Telnet Worldwide | Landline |
| 231-315 | Spok (paging) | Landline |
| 231-316 | Telnet Worldwide | Landline |
| 231-317 | Spok (paging) | Landline |
| 231-318 | Spok (paging) | Landline |
| 231-319 | Telnet Worldwide | Landline |
| 231-320 | Bandwidth.com | VoIP |
| 231-321 | Verizon Wireless | Wireless |
| 231-322 | Frontier Communications | Landline |
| 231-323 | Bandwidth.com | VoIP |
| 231-324 | AT&T (Teleport Communications) | Landline |
| 231-325 | Brightspeed | Landline |
| 231-326 | Brightspeed | Landline |
| 231-327 | AT&T Mobility | Wireless |
| 231-328 | Brightspeed | Landline |
| 231-329 | AT&T Mobility | Wireless |
| 231-330 | Verizon Wireless | Wireless |
| 231-331 | Frontier Communications | Landline |
| 231-332 | Telnet Worldwide | Landline |
| 231-333 | Lumen (Level 3) | VoIP |
| 231-334 | Brightspeed | Landline |
| 231-335 | AT&T Mobility | Wireless |
| 231-336 | Spok (paging) | Landline |
| 231-337 | AT&T Mobility | Wireless |
| 231-338 | Bandwidth.com | VoIP |
| 231-339 | American Messaging (paging) | Landline |
| 231-340 | Verizon Wireless | Wireless |
| 231-341 | AT&T Mobility | Wireless |
| 231-342 | Verizon Wireless | Wireless |
| 231-343 | T-Mobile (Omnipoint) | Landline |
| 231-344 | Telnet Worldwide | Landline |
| 231-345 | Bandwidth.com | VoIP |
| 231-346 | Telnet Worldwide | Landline |
| 231-347 | AT&T Midwest (Michigan Bell) | Landline |
| 231-348 | AT&T Midwest (Michigan Bell) | Landline |
| 231-349 | Verizon Wireless | Wireless |
| 231-350 | Verizon Wireless | Wireless |
| 231-351 | Telnet Worldwide | Landline |
| 231-352 | AT&T Midwest (Michigan Bell) | Landline |
| 231-353 | Telnet Worldwide | Landline |
| 231-354 | AT&T Midwest (Michigan Bell) | Landline |
| 231-355 | Telnet Worldwide | Landline |
| 231-356 | Telnet Worldwide | Landline |
| 231-357 | Verizon Wireless | Wireless |
| 231-358 | Telnet Worldwide | Landline |
| 231-359 | Spectrum (Charter IP) | Landline |
| 231-360 | AT&T Mobility | Wireless |
| 231-361 | Telnet Worldwide | Landline |
| 231-362 | Kaleva Tel. | Landline |
| 231-363 | Telnet Worldwide | Landline |
| 231-364 | Onvoy (Sinch) | VoIP |
| 231-365 | Telnet Worldwide | Landline |
| 231-366 | Lumen (Level 3) | VoIP |
| 231-367 | Onvoy (Sinch) | VoIP |
| 231-368 | Telnet Worldwide | Landline |
| 231-369 | Ace Tel. Co. Of Michigan | Landline |
| 231-370 | T-Mobile (Omnipoint) | Landline |
| 231-371 | Bandwidth.com | VoIP |
| 231-372 | Telnet Worldwide | Landline |
| 231-373 | Verizon Wireless | Wireless |
| 231-374 | Onvoy (Sinch) | VoIP |
| 231-375 | Verizon Wireless | Wireless |
| 231-376 | Onvoy (Sinch) | VoIP |
| 231-377 | Frontier Communications | Landline |
| 231-378 | Ace Tel. Co. Of Michigan | Landline |
| 231-379 | Bandwidth.com | VoIP |
| 231-380 | T-Mobile (Omnipoint) | Landline |
| 231-381 | Spectrum (Charter IP) | Landline |
| 231-383 | Verizon Wireless | Wireless |
| 231-384 | Verizon Wireless | Wireless |
| 231-385 | Onvoy (Sinch) | VoIP |
| 231-386 | AT&T Midwest (Michigan Bell) | Landline |
| 231-387 | AT&T Mobility | Wireless |
| 231-388 | Verizon Wireless | Wireless |
| 231-389 | AT&T Midwest (Michigan Bell) | Landline |
| 231-390 | T-Mobile (Omnipoint) | Landline |
| 231-391 | Bandwidth.com | VoIP |
| 231-392 | T-Mobile (Omnipoint) | Landline |
| 231-393 | Onvoy Spectrum (Sinch) | VoIP |
| 231-394 | Verizon Wireless | Wireless |
| 231-395 | Telnet Worldwide | Landline |
| 231-396 | Onvoy (Sinch) | VoIP |
| 231-397 | T-Mobile (Omnipoint) | Landline |
| 231-398 | AT&T Midwest (Michigan Bell) | Landline |
| 231-399 | Acd Telecom | Landline |
| 231-400 | Onvoy (Sinch) | VoIP |
| 231-401 | Peninsula Fiber Network | Landline |
| 231-402 | Onvoy (Sinch) | VoIP |
| 231-403 | At&T Enterprises | Landline |
| 231-404 | AT&T Mobility | Wireless |
| 231-405 | Onvoy (Sinch) | VoIP |
| 231-406 | Onvoy (Sinch) | VoIP |
| 231-407 | Onvoy (Sinch) | VoIP |
| 231-408 | AT&T Mobility | Wireless |
| 231-409 | AT&T Mobility | Wireless |
| 231-410 | AT&T Mobility | Wireless |
| 231-412 | Bandwidth.com | VoIP |
| 231-413 | T-Mobile (Omnipoint) | Landline |
| 231-414 | AT&T Mobility | Wireless |
| 231-415 | Spectrum (Charter IP) | Landline |
| 231-416 | American Messaging (paging) | Landline |
| 231-417 | AT&T (Teleport Communications) | Landline |
| 231-418 | Onvoy (Sinch) | VoIP |
| 231-419 | Onvoy (Sinch) | VoIP |
| 231-420 | Verizon Wireless | Wireless |
| 231-421 | Spectrum (Charter IP) | Landline |
| 231-422 | Lumen (CenturyLink) | Landline |
| 231-423 | Bandwidth.com | VoIP |
| 231-424 | Acd Telecom | Landline |
| 231-425 | T-Mobile (Omnipoint) | Landline |
| 231-426 | Onvoy (Sinch) | VoIP |
| 231-427 | At&T Enterprises | Landline |
| 231-428 | Onvoy (Sinch) | VoIP |
| 231-429 | Verizon Wireless | Wireless |
| 231-430 | Onvoy (Sinch) | VoIP |
| 231-431 | Onvoy (Sinch) | VoIP |
| 231-432 | AT&T Mobility | Wireless |
| 231-433 | Verizon Wireless | Wireless |
| 231-434 | AT&T Mobility | Wireless |
| 231-435 | Onvoy (Sinch) | VoIP |
| 231-436 | AT&T Midwest (Michigan Bell) | Landline |
| 231-437 | T-Mobile (Omnipoint) | Landline |
| 231-438 | Onvoy (Sinch) | VoIP |
| 231-439 | AT&T Midwest (Michigan Bell) | Landline |
| 231-440 | 123NET | Landline |
| 231-441 | 123NET | Landline |
| 231-442 | Peerless Network | VoIP |
| 231-443 | Onvoy (Sinch) | VoIP |
| 231-444 | Onvoy (Sinch) | VoIP |
| 231-445 | Verizon Wireless | Wireless |
| 231-446 | Onvoy (Sinch) | VoIP |
| 231-447 | Onvoy (Sinch) | VoIP |
| 231-448 | Island Tel. | Landline |
| 231-449 | Spectrum (Charter IP) | Landline |
| 231-450 | AT&T Mobility | Wireless |
| 231-451 | Onvoy (Sinch) | VoIP |
| 231-452 | Comcast (Xfinity Voice) | VoIP |
| 231-453 | Spectrum (Charter IP) | Landline |
| 231-454 | Metro by T-Mobile (MetroPCS) | Wireless |
| 231-455 | Onvoy (Sinch) | VoIP |
| 231-456 | AT&T Mobility | Wireless |
| 231-457 | Acd Telecom | Landline |
| 231-459 | Windstream (Paetec) | Landline |
| 231-460 | Onvoy (Sinch) | VoIP |
| 231-462 | AT&T Midwest (Michigan Bell) | Landline |
| 231-463 | Verizon Wireless | Wireless |
| 231-464 | AT&T Midwest (Michigan Bell) | Landline |
| 231-465 | AT&T Mobility | Wireless |
| 231-466 | Onvoy Spectrum (Sinch) | VoIP |
| 231-468 | T-Mobile (Omnipoint) | Landline |
| 231-469 | AT&T Mobility | Wireless |
| 231-475 | Bandwidth.com | VoIP |
| 231-477 | Kaleva Tel. | Landline |
| 231-480 | Lumen (Level 3) | VoIP |
| 231-484 | AT&T (Teleport Communications) | Landline |
| 231-486 | Verizon Business (MCImetro) | Landline |
| 231-487 | AT&T Midwest (Michigan Bell) | Landline |
| 231-488 | 123NET | Landline |
| 231-489 | Peninsula Fiber Network | Landline |
| 231-492 | Verizon Wireless | Wireless |
| 231-493 | T-Mobile (Omnipoint) | Landline |
| 231-494 | American Messaging (paging) | Landline |
| 231-495 | AT&T Mobility | Wireless |
| 231-497 | AT&T Mobility | Wireless |
| 231-498 | Lumen (Level 3) | VoIP |
| 231-499 | Verizon Wireless | Wireless |
| 231-500 | Onvoy (Sinch) | VoIP |
| 231-508 | Kaleva Telephone Company | Landline |
| 231-510 | AT&T Mobility | Wireless |
| 231-512 | American Messaging (paging) | Landline |
| 231-514 | American Messaging (paging) | Landline |
| 231-515 | Acd Telecom | Landline |
| 231-516 | American Messaging (paging) | Landline |
| 231-518 | Lumen (Level 3) | VoIP |
| 231-519 | Verizon Wireless | Wireless |
| 231-520 | 123NET | Landline |
| 231-522 | 123NET | Landline |
| 231-525 | AT&T Midwest (Michigan Bell) | Landline |
| 231-526 | AT&T Midwest (Michigan Bell) | Landline |
| 231-527 | AT&T Midwest (Michigan Bell) | Landline |
| 231-529 | Brightspeed | Landline |
| 231-531 | Metro by T-Mobile (MetroPCS) | Wireless |
| 231-533 | Frontier Communications | Landline |
| 231-534 | AT&T Local | Landline |
| 231-535 | AT&T Midwest (Michigan Bell) | Landline |
| 231-536 | AT&T Midwest (Michigan Bell) | Landline |
| 231-537 | Brightspeed | Landline |
| 231-538 | 123NET | Landline |
| 231-539 | AT&T Midwest (Michigan Bell) | Landline |
| 231-544 | Frontier Communications | Landline |
| 231-545 | Spectrum (Charter IP) | Landline |
| 231-546 | Brightspeed | Landline |
| 231-547 | AT&T Midwest (Michigan Bell) | Landline |
| 231-548 | Brightspeed | Landline |
| 231-549 | Brightspeed | Landline |
| 231-550 | Metro by T-Mobile (MetroPCS) | Wireless |
| 231-552 | T-Mobile (Omnipoint) | Landline |
| 231-557 | Verizon Wireless | Wireless |
| 231-559 | Bandwidth.com | VoIP |
| 231-563 | AT&T Mobility | Wireless |
| 231-564 | AT&T Mobility | Wireless |
| 231-566 | Ton80 Communications | Landline |
| 231-567 | AT&T (Teleport Communications) | Landline |
| 231-568 | 123NET | Landline |
| 231-569 | American Messaging (paging) | Landline |
| 231-570 | AT&T Mobility | Wireless |
| 231-571 | Frontier Communications | Landline |
| 231-577 | Lumen (Level 3) | VoIP |
| 231-578 | T-Mobile (Omnipoint) | Landline |
| 231-580 | T-Mobile (Omnipoint) | Landline |
| 231-581 | Spectrum (Charter IP) | Landline |
| 231-582 | AT&T Midwest (Michigan Bell) | Landline |
| 231-583 | 123NET | Landline |
| 231-584 | Pigeon Tel. | Landline |
| 231-585 | Pigeon Tel. | Landline |
| 231-587 | AT&T Midwest (Michigan Bell) | Landline |
| 231-588 | Frontier Communications | Landline |
| 231-590 | Verizon Wireless | Wireless |
| 231-591 | AT&T Midwest (Michigan Bell) | Landline |
| 231-592 | AT&T Midwest (Michigan Bell) | Landline |
| 231-593 | Spok (paging) | Landline |
| 231-594 | Twilio | VoIP |
| 231-596 | Spok (paging) | Landline |
| 231-597 | AT&T Midwest (Michigan Bell) | Landline |
| 231-598 | AT&T Mobility | Wireless |
| 231-599 | Frontier Communications | Landline |
| 231-600 | FracTEL | Landline |
| 231-604 | Spok (paging) | Landline |
| 231-605 | Spok (paging) | Landline |
| 231-608 | Spok (paging) | Landline |
| 231-613 | AT&T Mobility | Wireless |
| 231-614 | 123NET | Landline |
| 231-615 | American Messaging (paging) | Landline |
| 231-620 | AT&T Mobility | Wireless |
| 231-622 | Lumen (Level 3) | VoIP |
| 231-624 | T-Mobile (Omnipoint) | Landline |
| 231-625 | AT&T Midwest (Michigan Bell) | Landline |
| 231-626 | Spectrum (Charter IP) | Landline |
| 231-627 | AT&T Midwest (Michigan Bell) | Landline |
| 231-629 | T-Mobile (Omnipoint) | Landline |
| 231-631 | Verizon Wireless | Wireless |
| 231-632 | AT&T Mobility | Wireless |
| 231-633 | AT&T Mobility | Wireless |
| 231-634 | Island Tel. | Landline |
| 231-635 | 123NET | Landline |
| 231-636 | 123NET | Landline |
| 231-637 | Telnet Worldwide | Landline |
| 231-638 | T-Mobile (Omnipoint) | Landline |
| 231-639 | 123NET | Landline |
| 231-640 | AT&T Mobility | Wireless |
| 231-642 | T-Mobile (Omnipoint) | Landline |
| 231-643 | 123NET | Landline |
| 231-645 | AT&T Mobility | Wireless |
| 231-646 | Frontier Communications | Landline |
| 231-647 | Telnet Worldwide | Landline |
| 231-648 | Lumen (Level 3) | VoIP |
| 231-649 | Verizon Wireless | Wireless |
| 231-651 | AT&T Mobility | Wireless |
| 231-652 | AT&T Midwest (Michigan Bell) | Landline |
| 231-655 | Verizon Wireless | Wireless |
| 231-656 | 123NET | Landline |
| 231-660 | 123NET | Landline |
| 231-663 | Ton80 Communications | Landline |
| 231-666 | Onvoy (Sinch) | VoIP |
| 231-667 | AT&T Mobility | Wireless |
| 231-668 | Lumen (Level 3) | VoIP |
| 231-670 | Verizon Wireless | Wireless |
| 231-672 | AT&T (Teleport Communications) | Landline |
| 231-674 | Lumen (Level 3) | VoIP |
| 231-675 | AT&T Mobility | Wireless |
| 231-676 | AT&T Mobility | Wireless |
| 231-678 | Acd Telecom | Landline |
| 231-679 | Verizon Wireless | Wireless |
| 231-680 | Lumen (Level 3) | VoIP |
| 231-681 | Frontier Communications | Landline |
| 231-682 | Telnet Worldwide | Landline |
| 231-683 | Lumen (Level 3) | VoIP |
| 231-685 | Spectrum (Charter IP) | Landline |
| 231-686 | 123NET | Landline |
| 231-688 | FracTEL | Landline |
| 231-689 | AT&T Midwest (Michigan Bell) | Landline |
| 231-690 | Verizon Wireless | Wireless |
| 231-695 | Telnet Worldwide | Landline |
| 231-699 | Ton80 Communications | Landline |
| 231-707 | Onvoy (Sinch) | VoIP |
| 231-709 | AT&T Mobility | Wireless |
| 231-712 | American Messaging (paging) | Landline |
| 231-714 | Verizon Wireless | Wireless |
| 231-715 | AT&T Mobility | Wireless |
| 231-719 | Frontier Communications | Landline |
| 231-720 | Frontier Communications | Landline |
| 231-721 | 123NET | Landline |
| 231-722 | Frontier Communications | Landline |
| 231-723 | AT&T Midwest (Michigan Bell) | Landline |
| 231-724 | Frontier Communications | Landline |
| 231-725 | Frontier Communications | Landline |
| 231-726 | Frontier Communications | Landline |
| 231-727 | Frontier Communications | Landline |
| 231-728 | Frontier Communications | Landline |
| 231-729 | AT&T Mobility | Wireless |
| 231-730 | AT&T Mobility | Wireless |
| 231-731 | 123NET | Landline |
| 231-732 | Onvoy Spectrum (Sinch) | VoIP |
| 231-733 | Frontier Communications | Landline |
| 231-734 | AT&T Midwest (Michigan Bell) | Landline |
| 231-735 | Verizon Wireless | Wireless |
| 231-736 | Frontier Communications | Landline |
| 231-737 | Frontier Communications | Landline |
| 231-739 | Frontier Communications | Landline |
| 231-740 | Verizon Wireless | Wireless |
| 231-742 | AT&T Mobility | Wireless |
| 231-743 | AT&T Midwest (Michigan Bell) | Landline |
| 231-744 | Frontier Communications | Landline |
| 231-745 | AT&T Midwest (Michigan Bell) | Landline |
| 231-746 | Ton80 Communications | Landline |
| 231-747 | Frontier Communications | Landline |
| 231-750 | AT&T Mobility | Wireless |
| 231-751 | Onvoy (Sinch) | VoIP |
| 231-753 | Windstream (Paetec) | Landline |
| 231-755 | Frontier Communications | Landline |
| 231-757 | AT&T Midwest (Michigan Bell) | Landline |
| 231-758 | T-Mobile (Omnipoint) | Landline |
| 231-759 | Frontier Communications | Landline |
| 231-760 | Frontier Communications | Landline |
| 231-762 | Michigan Central Broadband Company | Landline |
| 231-763 | Spectrum (Charter IP) | Landline |
| 231-764 | Telnet Worldwide | Landline |
| 231-766 | Frontier Communications | Landline |
| 231-767 | Frontier Communications | Landline |
| 231-768 | AT&T Midwest (Michigan Bell) | Landline |
| 231-769 | Frontier Communications | Landline |
| 231-771 | Onvoy (Sinch) | VoIP |
| 231-772 | Ton80 Communications | Landline |
| 231-773 | Frontier Communications | Landline |
| 231-774 | Acd Telecom | Landline |
| 231-775 | AT&T Midwest (Michigan Bell) | Landline |
| 231-776 | 123NET | Landline |
| 231-777 | Frontier Communications | Landline |
| 231-778 | 123NET | Landline |
| 231-779 | AT&T Midwest (Michigan Bell) | Landline |
| 231-780 | Frontier Communications | Landline |
| 231-782 | 123NET | Landline |
| 231-786 | FracTEL | Landline |
| 231-787 | Onvoy (Sinch) | VoIP |
| 231-788 | Frontier Communications | Landline |
| 231-790 | Windstream (Paetec) | Landline |
| 231-791 | Windstream (Paetec) | Landline |
| 231-792 | 123NET | Landline |
| 231-793 | At&T Enterprises | Landline |
| 231-794 | AT&T Mobility | Wireless |
| 231-796 | AT&T Midwest (Michigan Bell) | Landline |
| 231-797 | AT&T Midwest (Michigan Bell) | Landline |
| 231-798 | Frontier Communications | Landline |
| 231-799 | Frontier Communications | Landline |
| 231-800 | Onvoy (Sinch) | VoIP |
| 231-803 | Lumen (Level 3) | VoIP |
| 231-805 | Acd Telecom | Landline |
| 231-806 | 123NET | Landline |
| 231-808 | 123NET | Landline |
| 231-813 | 123NET | Landline |
| 231-818 | AT&T Mobility | Wireless |
| 231-819 | Onvoy (Sinch) | VoIP |
| 231-821 | Frontier Communications | Landline |
| 231-822 | Telnet Worldwide | Landline |
| 231-823 | Frontier Communications | Landline |
| 231-824 | AT&T Midwest (Michigan Bell) | Landline |
| 231-825 | AT&T Midwest (Michigan Bell) | Landline |
| 231-826 | Brightspeed | Landline |
| 231-828 | Frontier Communications | Landline |
| 231-829 | AT&T Midwest (Michigan Bell) | Landline |
| 231-830 | Frontier Communications | Landline |
| 231-831 | Onvoy (Sinch) | VoIP |
| 231-832 | AT&T Midwest (Michigan Bell) | Landline |
| 231-833 | AT&T Mobility | Wireless |
| 231-834 | AT&T Midwest (Michigan Bell) | Landline |
| 231-835 | AT&T Mobility | Wireless |
| 231-836 | 123NET | Landline |
| 231-837 | American Messaging (paging) | Landline |
| 231-838 | AT&T Mobility | Wireless |
| 231-839 | Brightspeed | Landline |
| 231-842 | 123NET | Landline |
| 231-843 | Frontier Communications | Landline |
| 231-844 | Lumen (Level 3) | VoIP |
| 231-845 | Frontier Communications | Landline |
| 231-846 | T-Mobile (Omnipoint) | Landline |
| 231-848 | Kaleva Tel. | Landline |
| 231-852 | AT&T Mobility | Wireless |
| 231-853 | Frontier Communications | Landline |
| 231-854 | Frontier Communications | Landline |
| 231-855 | AT&T Mobility | Wireless |
| 231-856 | AT&T Midwest (Michigan Bell) | Landline |
| 231-859 | Kaleva Tel. | Landline |
| 231-861 | Frontier Communications | Landline |
| 231-862 | Ace Tel. Co. Of Michigan | Landline |
| 231-864 | Brightspeed | Landline |
| 231-865 | Frontier Communications | Landline |
| 231-866 | AT&T Mobility | Wireless |
| 231-867 | Brightspeed | Landline |
| 231-869 | Frontier Communications | Landline |
| 231-871 | AT&T Mobility | Wireless |
| 231-872 | AT&T Mobility | Wireless |
| 231-873 | Frontier Communications | Landline |
| 231-874 | 123NET | Landline |
| 231-875 | Bandwidth.com | VoIP |
| 231-876 | AT&T Midwest (Michigan Bell) | Landline |
| 231-877 | 123NET | Landline |
| 231-878 | Verizon Wireless | Wireless |
| 231-879 | AT&T Midwest (Michigan Bell) | Landline |
| 231-880 | Skye Telecom LLC dba Skyetel | Landline |
| 231-881 | AT&T Mobility | Wireless |
| 231-882 | AT&T Midwest (Michigan Bell) | Landline |
| 231-883 | AT&T Mobility | Wireless |
| 231-884 | AT&T Mobility | Wireless |
| 231-885 | Ace Tel. Co. Of Michigan | Landline |
| 231-886 | AT&T Mobility | Wireless |
| 231-887 | AT&T Mobility | Wireless |
| 231-888 | Onvoy (Sinch) | VoIP |
| 231-889 | AT&T Midwest (Michigan Bell) | Landline |
| 231-890 | AT&T Midwest (Michigan Bell) | Landline |
| 231-893 | Frontier Communications | Landline |
| 231-894 | Frontier Communications | Landline |
| 231-898 | Carr Tel. | Landline |
| 231-899 | 123NET | Landline |
| 231-900 | FracTEL | Landline |
| 231-902 | Telnet Worldwide | Landline |
| 231-903 | Lumen (Level 3) | VoIP |
| 231-907 | AT&T Mobility | Wireless |
| 231-908 | 123NET | Landline |
| 231-912 | AT&T Mobility | Wireless |
| 231-916 | Lumen (Level 3) | VoIP |
| 231-920 | AT&T Mobility | Wireless |
| 231-922 | AT&T Midwest (Michigan Bell) | Landline |
| 231-923 | T-Mobile (Omnipoint) | Landline |
| 231-924 | AT&T Midwest (Michigan Bell) | Landline |
| 231-925 | 123NET | Landline |
| 231-928 | AT&T Midwest (Michigan Bell) | Landline |
| 231-929 | AT&T Midwest (Michigan Bell) | Landline |
| 231-930 | Acd Telecom | Landline |
| 231-932 | AT&T Midwest (Michigan Bell) | Landline |
| 231-933 | AT&T Midwest (Michigan Bell) | Landline |
| 231-935 | AT&T Midwest (Michigan Bell) | Landline |
| 231-936 | Windstream (Paetec) | Landline |
| 231-937 | Frontier Communications | Landline |
| 231-938 | AT&T Midwest (Michigan Bell) | Landline |
| 231-939 | AT&T Mobility | Wireless |
| 231-941 | AT&T Midwest (Michigan Bell) | Landline |
| 231-942 | Verizon Wireless | Wireless |
| 231-943 | AT&T Midwest (Michigan Bell) | Landline |
| 231-944 | Cynergycomm.Net | Landline |
| 231-946 | AT&T Midwest (Michigan Bell) | Landline |
| 231-947 | AT&T Midwest (Michigan Bell) | Landline |
| 231-955 | AT&T Mobility | Wireless |
| 231-963 | Ton80 Communications | Landline |
| 231-966 | Ton80 Communications | Landline |
| 231-968 | Bandwidth.com | VoIP |
| 231-970 | AT&T Mobility | Wireless |
| 231-972 | Brightspeed | Landline |
| 231-974 | 123NET | Landline |
| 231-977 | FracTEL | Landline |
| 231-981 | Frontier Communications | Landline |
| 231-994 | Acd Telecom | Landline |
| 231-995 | AT&T Midwest (Michigan Bell) | Landline |
| 231-999 | Onvoy (Sinch) | VoIP |
Line type reflects the registry assignment; ported numbers can differ. Unknown 231 number calling? ActiveArmor® screens it before you ever look it up.
Cities & Communities in and around Area Code 231
Communities the 231 serves, filtered against the numbering registry’s rate centers, with each community’s key ZIP codes and the AT&T home internet available there. Cities link to their local AT&T internet page.
| City / community | Key ZIP codes | AT&T internet |
|---|---|---|
| Alanson | 49706, 49764, 49722 | Internet Air |
| Alden | 49612, 49676, 49629 | Internet Air |
| Arcadia | 49613, 49614, 49675 | Check address |
| Baldwin | 49304, 49642 | Internet Air |
| Bay View | 49722, 49770, 49764 | Check address |
| Bear Lake | 49646 | Internet Air |
| Bellaire | 49615, 49648, 49612 | Internet Air |
| Benzonia | 49616, 49617, 49635 | Internet Air |
| Beulah | 49616, 49617, 49635 | Internet Air |
| Big Rapids | 49307, 49338, 49346 | Internet Air |
| Boon | 49618, 49601, 49638 | Internet Air |
| Boyne City | 49712, 49796, 49727 | Internet Air |
| Boyne Falls | 49713, 49712, 49796 | Internet Air |
| Brutus | 49716, 49706, 49764 | Internet Air |
| Buckley | 49620, 49668 | Internet Air |
| Cadillac | 49601 | Internet Air |
| Carp Lake | 49701, 49718, 49755 | Internet Air |
| Cedar | 49621, 49664, 49684 | Internet Air |
| Central Lake | 49622, 49627, 49648 | Internet Air |
| Charlevoix | 49720 | Internet Air |
| Cheboygan | 49721 | Internet Air |
| Coopersville | 49404, 49430, 49435 | Internet Air |
| Copemish | 49683, 49625 | Internet Air |
| Custer | 49454, 49405, 49458 | Internet Air |
| East Jordan | 49727, 49712, 49729 | Internet Air |
| Eastlake | 49626, 49634, 49660 | Internet Air |
| Elberta | 49628, 49635, 49616 | Check address |
| Elk Rapids | 49629, 49676, 49686 | Internet Air |
| Ellsworth | 49729, 49622, 49627 | Internet Air |
| Evart | 49631, 49679, 49639 | Internet Air |
| Fife Lake | 49680 | Internet Air |
| Filer City | 49634, 49626, 49660 | Internet Air |
| Frankfort | 49628, 49635 | Internet Air |
| Free Soil | 49411, 49410 | Internet Air |
| Fremont | 49412, 49425 | Internet Air |
| Fruitport | 49415, 49456, 49444 | Internet Air |
| Gaylord | 49735 | Internet Air |
| Grant | 49327, 49303, 49330 | Internet Air |
| Grawn | 49637, 49685, 49684 | Internet Air |
| Harbor Springs | 49722, 49740, 49764 | Internet Air |
| Harrietta | 49638, 49618, 49668 | Check address |
| Hart | 49420, 49436, 49455 | Internet Air |
| Hersey | 49639, 49677 | Internet Air |
| Hesperia | 49421 | Internet Air |
| Honor | 49617, 49640, 49616 | Internet Air |
| Howard City | 49329, 49339, 49322 | Internet Air |
| Indian River | 49749, 49717, 49791 | Internet Air |
| Interlochen | 49637, 49643, 49685 | Check address |
| Kaleva | 49645, 49619, 49614 | Check address |
| Kalkaska | 49680, 49646 | Internet Air |
| Kent City | 49330, 49318, 49345 | Internet Air |
| Kingsley | 49649, 49696 | Internet Air |
| Lake City | 49651, 49657 | Internet Air |
| Lake Leelanau | 49653, 49682, 49674 | Internet Air |
| Leland | 49653, 49682 | Check address |
| Leroy | — | Internet Air |
| Ludington | 49431, 49454 | Internet Air |
| Luther | 49656 | Check address |
| Mackinaw City | 49701, 49718 | Internet Air |
| Mancelona | 49659, 49611 | Internet Air |
| Manistee | 49626, 49634, 49660 | Internet Air |
| Manton | 49663 | Internet Air |
| Maple City | 49664, 49621, 49636 | Internet Air |
| Marion | 49665 | Internet Air |
| McBain | 49657, 49665 | Check address |
| Mears | 49436, 49455, 49420 | Internet Air |
| Mecosta | 49332, 49340, 49342 | Internet Air |
| Mesick | 49668, 49625, 49620 | Internet Air |
| Montague | 49461, 49437 | Internet Air |
| Morley | 49336, 49329, 49346 | Internet Air |
| Muskegon | 49440, 49443, 49441 | Internet Air |
| New Era | 49446, 49455, 49452 | Internet Air |
| Newaygo | 49337, 49327 | Internet Air |
| Northport | 49670, 49674 | Internet Air |
| Norton Shores | 49444, 49441, 49443 | Fiber up to 5 GIG |
| Nunica | 49448, 49415, 49404 | Fiber up to 5 GIG |
| Omena | 49674, 49670, 49682 | Check address |
| Onekama | 49675, 49614 | Check address |
| Paris | 49338, 49307, 49639 | Internet Air |
| Pellston | 49716, 49769, 49755 | Check address |
| Pentwater | 49449, 49436 | Internet Air |
| Petoskey | 49770, 49796 | Internet Air |
| Pierson | 49339, 49343, 49329 | Internet Air |
| Rapid City | 49676, 49612, 49690 | Internet Air |
| Ravenna | 49451, 49403, 49318 | Internet Air |
| Reed City | 49677, 49639 | Internet Air |
| Rothbury | 49446, 49437, 49452 | Internet Air |
| Scottville | 49454, 49405, 49431 | Internet Air |
| Shelby | 49455, 49446, 49436 | Internet Air |
| South Boardman | 49680, 49633 | Internet Air |
| Spring Lake | 49409, 49456, 49417 | Fiber up to 5 GIG |
| Stanwood | 49346, 49336 | Internet Air |
| Stronach | 49634, 49626, 49660 | Check address |
| Suttons Bay | 49682, 49653, 49674 | Internet Air |
| Thompsonville | 49683, 49625 | Internet Air |
| Traverse City | 49684, 49685, 49686 | Internet Air |
| Tustin | 49688, 49655 | Internet Air |
| Twin Lake | 49457, 49425, 49461 | Internet Air |
| Vanderbilt | 49795 | Internet Air |
| Walloon Lake | 49796, 49770, 49712 | Internet Air |
| White Cloud | 49349 | Internet Air |
| Whitehall | 49461, 49437, 49445 | Internet Air |
| Wolverine | 49799, 49795 | Internet Air |
City list: AT&T service-area records and the public numbering registry. Key ZIPs: U.S. Census data for each community. Internet type: AT&T eligibility data, June 2026. Availability is always confirmed at your exact address.
231 Area Code Map
Area code 231 serves Muskegon and nearby communities in MI.
↓ Printable PDF
Open the printable 231 map (PDF) · All Michigan area codes · Home internet in Muskegon
Counties Covered by the 231 Area Code
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 231 also reaches parts of Montcalm County, Newaygo County, Mecosta County, Emmet County, Wexford County, Mason County, Oceana County, Charlevoix County and 10 more.
The 231, explained
Area Code 231: More Than a Number in Muskegon
In Muskegon, the 231 is more than digits on a caller ID. It arrived in 1999, carved out of the 616, and it has meant Muskegon and surrounding communities ever since — 572 carrier prefixes keep its lines busy today, and an established 231 number still says you’ve been here a while.
The map tells its own story: Muskegon and surrounding communities, with no overlay on its territory. The area and the code are still one and the same — rare in Michigan and getting rarer nationwide.
Keeping a 231 matters here. An existing 231 number ports to a new phone, a new carrier, or a new AT&T line, and stays yours anywhere in the U.S.
Need a new local number? Shop plans Keep your 231: bring it to AT&TInternet, wireless & stores in the 231
AT&T Home Internet in Area Code 231
AT&T home internet serves communities across area code 231, with AT&T Fiber where it’s built and AT&T Internet Air covering the gaps. Availability is decided address by address; every community in the table above links to its local internet page.
No data capsNo annual contractNo equipment fees
AT&T Fiber: Ltd. avail/areas. Speeds based on wired connection. Actual speeds vary. For 5-GIG, single device wired speed maximum 4.7Gbps. For more info., visit att.com/speed101. AT&T Internet Air: AT&T Internet Air not available in all areas. In rare cases, if your usage is contributing to congestion on the network, AT&T will greatly reduce your speed for a minimum of 30 min.
Pair it with wireless in an internet + wireless bundle. Run a business in the 231? AT&T Business Internet is available at many addresses.
Fiber install day in the 231Check your address ›
Moving to Area Code 231?
Set up home internet in area code 231 before the boxes arrive, and find your new community in the table above or check your exact address below.
Your number moves with you: port your 231 number from anywhere, or keep your old number when you arrive. An AT&T store nearby can handle the whole switch in one visit.
1 · Check your addressSee Fiber or Internet Air availability in seconds.
2 · Schedule for move-in dayInstall lined up before the boxes arrive.
3 · Keep your numberYour mobile number ports; your internet moves.
Get set up before move-in dayPlan your move ›
AT&T Wireless in Area Code 231
AT&T’s 5G network covers most of area code 231. ActiveArmor® spam blocking is included with every unlimited plan, your 231 number stays yours, and great cell phone deals in Muskegon are a tap away.
5G across the 231ActiveArmor® includedKeep your 231 number
AT&T may temporarily slow data speeds if the network is busy. 5G req’s compatible plan & device. Coverage not available everywhere. Learn more at att.com/5Gforyou.
Need a new 231 number? Ask when you activate a line, and porting an existing 231 number keeps it yours.
Stay connected across MuskegonShop wireless plans ›
AT&T Stores in Area Code 231
Looking for cell phone stores in area code 231? These stores answer on 231 numbers — walk in for switching, porting, upgrades and hands-on help:
Every AT&T store in the region, company owned and authorized retailer alike, each with its own store page.
Real help from real people in MuskegonFind your store ›
All AT&T Stores with 231 Numbers
Every store below answers on a 231 number. Tap any number to call.
15 AT&T stores with 231 numbers
International Calling from Area Code 231
Calling abroad from area code 231? AT&T International Calling adds discounted or unlimited rates to 200+ countries on top of your existing plan, and unlimited texting from the U.S. to 200+ destinations is already included on AT&T unlimited plans.
Where the 231 calls most:IndiaMexicoIraqCanadaChina
Top places of birth among foreign-born residents of the 231’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 231 number: dial 011 + country code + number (or just + on a mobile). Traveling abroad instead? International Day Pass® takes your talk, text and data with you for a flat daily rate.
International Calling and International Day Pass® availability, rates and included destinations vary by plan; see att.com for the current country list.
Muskegon calls the worldSee international plans ›
231 Area Code Quick Facts & Dialing
StateMichigan
Time zoneEastern
OverlaysNonethe 231 stands alone
Established1999split from the 616
Dialing10 digits7-digit local calls may still work
Toll-free?Nogeographic code
Population1.74Mcounties served, Census 2023
Largest cityMuskegon+102 more ›
How to dial a 231 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 231 + 7-digit number | (231) 555-0100 |
| Long distance (within the U.S.) | 1 + 231 + 7-digit number | 1 (231) 555-0100 |
| Calling 231 from another country | +1 231 + 7-digit number | +1 231 555 0100 |
| From a mobile phone | (231) + 7-digit number | (231) 555-0100 |
A Short History of Area Code 231
Created in 1999 as a split from the 616, the 231 has meant Muskegon and surrounding communities ever since. No splits or overlays have divided its territory since.
1999Split from the 616
In service since 1999, with no overlay on its territory today.
Nearby & Related Area Codes
Browse area codes by state: Michigan (13) · California (41) · Texas (29) · Florida (23) · all 50 states ›
Area Code 231 FAQ
What area code is 231?
231 is the area code for Muskegon, Michigan and the surrounding communities. It appears at the front of every local 10-digit phone number in the area.
Where is area code 231?
Area code 231 serves Muskegon, Michigan and nearby communities including Afton, Alanson, Alden. The full city list is in the cities table above.
Why did I get a text message from a 231 number?
The most common 231 text scam opens like a wrong number (“u at home?”, “are you busy tomorrow?”) and tries to move you to WhatsApp. Don’t reply. Forward the text to 7726 (SPAM) and delete it. AT&T ActiveArmor® filters known scam senders automatically.
Who called me from area code 231?
A 231 number usually means Muskegon or a nearby community, but spoofing is common. This page’s prefix lookup isn’t a reverse phone lookup — it can’t name the caller, but it shows the carrier, line type and community a number was issued to, which is often enough to judge a call.
What time zone is area code 231?
Eastern time. The live local time is shown at the top of this page.
Why am I getting calls from 231 numbers?
231 is an active, legitimate Michigan area code, but scammers spoof local numbers because people answer them. If there’s no voicemail, let it go. AT&T ActiveArmor® blocks and labels spam automatically, and you can report unwanted calls at reportfraud.ftc.gov. The spam report board above shows which 231 prefixes are drawing complaints right now.
Is 231 a toll-free number?
No. 231 is a geographic area code tied to Muskegon, Michigan. Toll-free calls come from 800, 833, 844, 855, 866, 877 and 888 numbers.
When was area code 231 created?
Area code 231 entered service in 1999 and still covers Muskegon and the surrounding Michigan communities today. The full timeline is in the history section above.
Which cities use area code 231?
The largest communities include Alanson, Alden, Arcadia, Baldwin, Bay View. The full list is in the cities table above.
Does AT&T offer service in the 231?
Yes: home internet, wireless and retail stores across the 231. Availability is checked address by address.
Can I still get a 231 number?
Yes. Carriers in Muskegon and across the 231 still issue 231 numbers on new lines, and you can port an existing 231 number to any carrier.
Can I keep my 231 number if I move?
Yes. Phone numbers are portable: your 231 number can move with you anywhere in the U.S., whether you stay with your carrier or switch.
Sources: city and store data from AT&T records; prefix and carrier assignments from the public numbering registry (pulled July 2026). Facts regenerate monthly.
