Who Called Me from Area Code 636?
- 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 636 prefixes, right on this page.
- Curious who issued a number? Every 636 prefix belongs to a carrier — the registry names it.
199 unwanted-call reports naming 636 numbers in FTC Do Not Call complaint data, July 2–17, 2026. Consumer-reported and unverified.
Block spam calls in the 636, 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℠ trial- 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 636 a Scam?
It’s carved from the 314 in 1999 and serves O'Fallon and surrounding communities. But legitimacy of the code says nothing about any single call. Scammers spoof local numbers constantly.
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 636 numbers
The most common area code 636 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 636
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 636 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 636 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 636 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.
636 Area Code Prefix & Carrier Lookup
The three digits after the area code identify the carrier a number was issued to. All 432 assigned 636 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 636 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.
| Prefix | Carrier | Line type |
|---|---|---|
| 636-200 | Onvoy (Sinch) | VoIP |
| 636-201 | AT&T Mobility | Wireless |
| 636-202 | Verizon Business (MCImetro) | Landline |
| 636-203 | Verizon Business (MCImetro) | Landline |
| 636-204 | Onvoy (Sinch) | VoIP |
| 636-205 | Lumen (Level 3) | VoIP |
| 636-206 | At&T Enterprises | Landline |
| 636-207 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-208 | AT&T Mobility | Wireless |
| 636-209 | Verizon Wireless | Wireless |
| 636-210 | AT&T Mobility | Wireless |
| 636-212 | Verizon Wireless | Wireless |
| 636-213 | T-Mobile | Wireless |
| 636-214 | T-Mobile | Wireless |
| 636-215 | Verizon Wireless | Wireless |
| 636-216 | Onvoy (Sinch) | VoIP |
| 636-218 | AT&T Mobility | Wireless |
| 636-219 | T-Mobile | Wireless |
| 636-220 | Spectrum (Charter IP) | Landline |
| 636-221 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-222 | Verizon Wireless | Wireless |
| 636-223 | Spectrum (Charter IP) | Landline |
| 636-224 | Windstream (Paetec) | Landline |
| 636-225 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-226 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-227 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-228 | Brightspeed | Landline |
| 636-229 | Verizon Business (MCImetro) | Landline |
| 636-230 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-231 | Windstream (Paetec) | Landline |
| 636-232 | Lumen (Level 3) | VoIP |
| 636-233 | Verizon Wireless | Wireless |
| 636-234 | Lumen (Level 3) | VoIP |
| 636-235 | Lumen (Level 3) | VoIP |
| 636-236 | T-Mobile | Wireless |
| 636-237 | Verizon Business (MCImetro) | Landline |
| 636-238 | Verizon Business (MCImetro) | Landline |
| 636-239 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-240 | Brightspeed | Landline |
| 636-241 | Verizon Wireless | Wireless |
| 636-242 | Brightspeed | Landline |
| 636-243 | Lumen (Level 3) | VoIP |
| 636-244 | Spectrum (Charter IP) | Landline |
| 636-245 | AT&T Mobility | Wireless |
| 636-246 | Onvoy (Sinch) | VoIP |
| 636-247 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-248 | Verizon Wireless | Wireless |
| 636-249 | Metro by T-Mobile (MetroPCS) | Wireless |
| 636-250 | New Florence Tel. Co. | Landline |
| 636-251 | Verizon Wireless | Wireless |
| 636-252 | T-Mobile | Wireless |
| 636-253 | T-Mobile | Wireless |
| 636-254 | Verizon Wireless | Wireless |
| 636-255 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-256 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-257 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-258 | New Florence Tel. Co. | Landline |
| 636-259 | T-Mobile | Wireless |
| 636-260 | Onvoy (Sinch) | VoIP |
| 636-261 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-262 | T-Mobile | Wireless |
| 636-263 | AT&T Local | Landline |
| 636-264 | Lumen (Level 3) | VoIP |
| 636-265 | Spectrum (Charter IP) | Landline |
| 636-266 | Lumen (Level 3) | VoIP |
| 636-267 | Onvoy (Sinch) | VoIP |
| 636-268 | Onvoy (Sinch) | VoIP |
| 636-269 | Onvoy (Sinch) | VoIP |
| 636-270 | Onvoy (Sinch) | VoIP |
| 636-271 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-272 | Brightspeed | Landline |
| 636-273 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-274 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-275 | Verizon Wireless | Wireless |
| 636-276 | Onvoy (Sinch) | VoIP |
| 636-277 | Peerless Network | VoIP |
| 636-278 | Brightspeed | Landline |
| 636-279 | Brightspeed | Landline |
| 636-280 | Onvoy (Sinch) | VoIP |
| 636-281 | Brightspeed | Landline |
| 636-282 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-283 | AT&T (Teleport Communications) | Landline |
| 636-284 | AT&T Mobility | Wireless |
| 636-285 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-286 | AT&T Mobility | Wireless |
| 636-287 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-288 | AT&T Mobility | Wireless |
| 636-289 | Bandwidth.com | VoIP |
| 636-290 | T-Mobile | Wireless |
| 636-291 | AT&T Mobility | Wireless |
| 636-292 | AT&T (Teleport Communications) | Landline |
| 636-293 | T-Mobile | Wireless |
| 636-294 | Spectrum (Charter IP) | Landline |
| 636-295 | Verizon Wireless | Wireless |
| 636-296 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-297 | Verizon Wireless | Wireless |
| 636-298 | AT&T Mobility | Wireless |
| 636-299 | T-Mobile | Wireless |
| 636-300 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-301 | Shelcomm | Landline |
| 636-303 | Telnyx | Landline |
| 636-305 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-306 | Metro by T-Mobile (MetroPCS) | Wireless |
| 636-310 | Spectrum (Charter IP) | Landline |
| 636-312 | AT&T Mobility | Wireless |
| 636-313 | T-Mobile | Wireless |
| 636-317 | Spectrum (Charter IP) | Landline |
| 636-318 | T-Mobile | Wireless |
| 636-319 | Brightspeed | Landline |
| 636-320 | Spok (paging) | Landline |
| 636-321 | Windstream (Paetec) | Landline |
| 636-322 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-323 | Lumen (Level 3) | VoIP |
| 636-324 | Onvoy (Sinch) | VoIP |
| 636-326 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-327 | Brightspeed | Landline |
| 636-328 | Verizon Business (MCImetro) | Landline |
| 636-329 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-330 | Peerless Network | VoIP |
| 636-331 | T-Mobile | Wireless |
| 636-332 | Brightspeed | Landline |
| 636-333 | Onvoy (Sinch) | VoIP |
| 636-334 | Lumen (Level 3) | VoIP |
| 636-335 | Verizon Business (MCImetro) | Landline |
| 636-336 | Windstream (Paetec) | Landline |
| 636-337 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-338 | Brightspeed | Landline |
| 636-339 | T-Mobile | Wireless |
| 636-341 | T-Mobile | Wireless |
| 636-342 | Boost Mobile | Landline |
| 636-343 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-344 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-345 | Verizon Business (MCImetro) | Landline |
| 636-346 | T-Mobile | Wireless |
| 636-347 | Hd Carrier | Landline |
| 636-348 | FracTEL | Landline |
| 636-349 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-351 | Boost Mobile | Landline |
| 636-352 | Lumen (Level 3) | VoIP |
| 636-354 | AT&T Mobility | Wireless |
| 636-355 | Brightspeed | Landline |
| 636-356 | Brightspeed | Landline |
| 636-357 | AT&T Mobility | Wireless |
| 636-358 | AT&T Mobility | Wireless |
| 636-359 | AT&T Mobility | Wireless |
| 636-362 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-364 | Lumen (Level 3) | VoIP |
| 636-366 | Brightspeed | Landline |
| 636-367 | T-Mobile | Wireless |
| 636-368 | T-Mobile | Wireless |
| 636-369 | Onvoy (Sinch) | VoIP |
| 636-373 | T-Mobile | Wireless |
| 636-375 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-376 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-377 | Brightspeed | Landline |
| 636-378 | T-Mobile | Wireless |
| 636-379 | Brightspeed | Landline |
| 636-380 | Verizon Wireless | Wireless |
| 636-383 | Metro by T-Mobile (MetroPCS) | Wireless |
| 636-384 | AT&T Mobility | Wireless |
| 636-385 | Brightspeed | Landline |
| 636-386 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-387 | Spectrum (Charter IP) | Landline |
| 636-388 | Lumen (Level 3) | VoIP |
| 636-389 | Lumen (Level 3) | VoIP |
| 636-390 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-391 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-392 | Aurora Communications | Landline |
| 636-393 | Spectrum (Charter IP) | Landline |
| 636-394 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-395 | At&T Enterprises | Landline |
| 636-396 | Onvoy (Sinch) | VoIP |
| 636-397 | Brightspeed | Landline |
| 636-398 | Brightspeed | Landline |
| 636-399 | Verizon Wireless | Wireless |
| 636-400 | Onvoy (Sinch) | VoIP |
| 636-402 | Windstream (Paetec) | Landline |
| 636-403 | Spok (paging) | Landline |
| 636-405 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-406 | Onvoy (Sinch) | VoIP |
| 636-407 | Onvoy (Sinch) | VoIP |
| 636-408 | Onvoy (Sinch) | VoIP |
| 636-409 | Spectrum (Charter IP) | Landline |
| 636-410 | Verizon Business (MCImetro) | Landline |
| 636-412 | Verizon Business (MCImetro) | Landline |
| 636-415 | AT&T Mobility | Wireless |
| 636-422 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-424 | Onvoy (Sinch) | VoIP |
| 636-425 | Windstream (Paetec) | Landline |
| 636-426 | T-Mobile | Wireless |
| 636-427 | AT&T Mobility | Wireless |
| 636-428 | AT&T (Teleport Communications) | Landline |
| 636-429 | Peerless Network | VoIP |
| 636-430 | T-Mobile | Wireless |
| 636-431 | Verizon Business (MCImetro) | Landline |
| 636-432 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-433 | Brightspeed | Landline |
| 636-434 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-435 | Verizon Business (MCImetro) | Landline |
| 636-438 | Verizon Business (MCImetro) | Landline |
| 636-439 | AT&T Mobility | Wireless |
| 636-441 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-442 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-443 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-444 | Onvoy (Sinch) | VoIP |
| 636-445 | Lumen (CenturyLink) | Landline |
| 636-447 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-448 | AT&T Mobility | Wireless |
| 636-449 | Windstream (Paetec) | Landline |
| 636-450 | AT&T Mobility | Wireless |
| 636-451 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-452 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-456 | Brightspeed | Landline |
| 636-458 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-459 | Verizon Wireless | Wireless |
| 636-461 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-462 | Brightspeed | Landline |
| 636-463 | Brightspeed | Landline |
| 636-464 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-465 | Spectrum (Charter IP) | Landline |
| 636-466 | AT&T Mobility | Wireless |
| 636-467 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-470 | Shelcomm | Landline |
| 636-473 | AT&T Local | Landline |
| 636-474 | Brightspeed | Landline |
| 636-475 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-477 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-479 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-481 | Lumen (Level 3) | VoIP |
| 636-482 | Brightspeed | Landline |
| 636-484 | Verizon Wireless | Wireless |
| 636-485 | Verizon Wireless | Wireless |
| 636-486 | Lumen (Level 3) | VoIP |
| 636-487 | Lumen (Level 3) | VoIP |
| 636-488 | Brightspeed | Landline |
| 636-489 | Lumen (Level 3) | VoIP |
| 636-492 | Verizon Business (MCImetro) | Landline |
| 636-493 | Spectrum (Charter IP) | Landline |
| 636-495 | Windstream (Paetec) | Landline |
| 636-496 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-497 | T-Mobile | Wireless |
| 636-498 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-500 | Onvoy (Sinch) | VoIP |
| 636-515 | AT&T Mobility | Wireless |
| 636-517 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-519 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-524 | Lumen (Level 3) | VoIP |
| 636-525 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-527 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-528 | Brightspeed | Landline |
| 636-529 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-530 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-532 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-533 | Verizon Business (MCImetro) | Landline |
| 636-534 | Verizon Business (MCImetro) | Landline |
| 636-535 | Verizon Wireless | Wireless |
| 636-536 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-537 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-538 | T-Mobile | Wireless |
| 636-541 | AT&T Mobility | Wireless |
| 636-542 | Windstream (Paetec) | Landline |
| 636-543 | AT&T (Teleport Communications) | Landline |
| 636-544 | AT&T Mobility | Wireless |
| 636-547 | Lumen (Level 3) | VoIP |
| 636-548 | Bandwidth.com | VoIP |
| 636-549 | Windstream (Paetec) | Landline |
| 636-551 | Verizon Wireless | Wireless |
| 636-552 | Lumen (Level 3) | VoIP |
| 636-556 | Onvoy (Sinch) | VoIP |
| 636-557 | Verizon Business (MCImetro) | Landline |
| 636-561 | Brightspeed | Landline |
| 636-565 | Lumen (Level 3) | VoIP |
| 636-566 | Brightspeed | Landline |
| 636-573 | Verizon Business (MCImetro) | Landline |
| 636-574 | American Messaging (paging) | Landline |
| 636-575 | AT&T Mobility | Wireless |
| 636-577 | AT&T Mobility | Wireless |
| 636-578 | T-Mobile | Wireless |
| 636-579 | T-Mobile | Wireless |
| 636-582 | Aurora Communications | Landline |
| 636-583 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-584 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-585 | Brightspeed | Landline |
| 636-586 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-587 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-589 | Onvoy (Sinch) | VoIP |
| 636-590 | Lumen (Level 3) | VoIP |
| 636-591 | Windstream (Paetec) | Landline |
| 636-594 | Verizon Business (MCImetro) | Landline |
| 636-597 | Brightspeed | Landline |
| 636-600 | Onvoy (Sinch) | VoIP |
| 636-614 | Lumen (Level 3) | VoIP |
| 636-622 | Verizon Business (MCImetro) | Landline |
| 636-625 | Brightspeed | Landline |
| 636-626 | Onvoy (Sinch) | VoIP |
| 636-627 | Spectrum (Charter IP) | Landline |
| 636-628 | Lumen (Level 3) | VoIP |
| 636-629 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-630 | Commio | Landline |
| 636-633 | T-Mobile | Wireless |
| 636-634 | Lumen (Level 3) | VoIP |
| 636-635 | Onvoy Spectrum (Sinch) | VoIP |
| 636-637 | Verizon Business (MCImetro) | Landline |
| 636-638 | Spectrum (Charter IP) | Landline |
| 636-639 | Brightspeed | Landline |
| 636-642 | Lumen (Level 3) | VoIP |
| 636-648 | Terra Nova Telecom | Landline |
| 636-649 | AT&T Mobility | Wireless |
| 636-651 | AT&T (Teleport Communications) | Landline |
| 636-655 | Skye Telecom LLC dba Skyetel | Landline |
| 636-660 | Windstream (Paetec) | Landline |
| 636-661 | Brightspeed | Landline |
| 636-662 | Brightspeed | Landline |
| 636-665 | Brightspeed | Landline |
| 636-666 | Terra Nova Telecom | Landline |
| 636-667 | T-Mobile | Wireless |
| 636-668 | Brightspeed | Landline |
| 636-669 | Windstream (Paetec) | Landline |
| 636-671 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-673 | Brightspeed | Landline |
| 636-674 | Windstream (Paetec) | Landline |
| 636-675 | T-Mobile | Wireless |
| 636-677 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-678 | Lumen (Level 3) | VoIP |
| 636-679 | T-Mobile | Wireless |
| 636-680 | Windstream (Paetec) | Landline |
| 636-681 | AT&T (Teleport Communications) | Landline |
| 636-685 | AT&T (Teleport Communications) | Landline |
| 636-686 | AT&T (Teleport Communications) | Landline |
| 636-688 | AT&T (Teleport Communications) | Landline |
| 636-689 | AT&T (Teleport Communications) | Landline |
| 636-692 | Windstream (Paetec) | Landline |
| 636-695 | AT&T (Teleport Communications) | Landline |
| 636-696 | AT&T (Teleport Communications) | Landline |
| 636-697 | AT&T (Teleport Communications) | Landline |
| 636-698 | AT&T (Teleport Communications) | Landline |
| 636-699 | Onvoy (Sinch) | VoIP |
| 636-706 | Lumen (CenturyLink) | Landline |
| 636-707 | Lumen (Level 3) | VoIP |
| 636-717 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-720 | Windstream (Paetec) | Landline |
| 636-722 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-723 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-724 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-725 | Windstream (Paetec) | Landline |
| 636-728 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-730 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-732 | FracTEL | Landline |
| 636-733 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-734 | T-Mobile | Wireless |
| 636-735 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-736 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-737 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-741 | Windstream (Paetec) | Landline |
| 636-742 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-744 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-745 | Brightspeed | Landline |
| 636-746 | Ton80 Communications | Landline |
| 636-747 | Onvoy (Sinch) | VoIP |
| 636-748 | Bandwidth.com | VoIP |
| 636-751 | Verizon Wireless | Wireless |
| 636-753 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-754 | Verizon Business (MCImetro) | Landline |
| 636-755 | Brightspeed | Landline |
| 636-757 | Windstream (Paetec) | Landline |
| 636-758 | FracTEL | Landline |
| 636-764 | Lumen (Level 3) | VoIP |
| 636-773 | Onvoy (Sinch) | VoIP |
| 636-775 | Spectrum (Charter IP) | Landline |
| 636-777 | Onvoy (Sinch) | VoIP |
| 636-778 | Spectrum (Charter IP) | Landline |
| 636-779 | Windstream (Paetec) | Landline |
| 636-782 | Brightspeed | Landline |
| 636-787 | Verizon Business (MCImetro) | Landline |
| 636-789 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-791 | Brightspeed | Landline |
| 636-793 | Verizon Business (MCImetro) | Landline |
| 636-794 | Verizon Business (MCImetro) | Landline |
| 636-795 | AT&T Mobility | Wireless |
| 636-797 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-798 | Brightspeed | Landline |
| 636-800 | Onvoy (Sinch) | VoIP |
| 636-812 | Windstream (Paetec) | Landline |
| 636-821 | Windstream (Paetec) | Landline |
| 636-825 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-827 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-828 | Brightspeed | Landline |
| 636-829 | T-Mobile | Wireless |
| 636-837 | Ton80 Communications | Landline |
| 636-841 | T-Mobile | Wireless |
| 636-849 | T-Mobile | Wireless |
| 636-851 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-856 | Spectrum (Charter IP) | Landline |
| 636-861 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-865 | AT&T (Teleport Communications) | Landline |
| 636-866 | Verizon Business (MCImetro) | Landline |
| 636-867 | Ton80 Communications | Landline |
| 636-874 | Ton80 Communications | Landline |
| 636-875 | Windstream (Paetec) | Landline |
| 636-887 | Spectrum (Charter IP) | Landline |
| 636-888 | Peerless Network | VoIP |
| 636-891 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-893 | Verizon Business (MCImetro) | Landline |
| 636-896 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-898 | Verizon Business (MCImetro) | Landline |
| 636-899 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-900 | Onvoy (Sinch) | VoIP |
| 636-916 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-922 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-923 | Windstream (Paetec) | Landline |
| 636-925 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-926 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-928 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-931 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-932 | Brightspeed | Landline |
| 636-933 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-936 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-937 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-938 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-939 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-940 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-942 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-944 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-946 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-947 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-948 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-949 | AT&T Southwest (Southwestern Bell) | Landline |
| 636-970 | Brightspeed | Landline |
| 636-978 | Brightspeed | Landline |
| 636-980 | Brightspeed | Landline |
| 636-987 | Brightspeed | Landline |
| 636-999 | Onvoy (Sinch) | VoIP |
Line type reflects the registry assignment; ported numbers can differ. Unknown 636 number calling? ActiveArmor® screens it before you ever look it up.
Cities & Communities in and around Area Code 636
Communities the 636 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 |
|---|---|---|
| Affton | 63123, 63125, 63126 | Fiber up to 5 GIG |
| Arnold | 63010, 63129, 63052 | Fiber up to 5 GIG |
| Augusta | 63332, 63055, 63039 | Internet Air |
| Ballwin | 63011, 63021, 63088 | Fiber up to 5 GIG |
| Barnhart | 63012, 63053, 63070 | Fiber up to 5 GIG |
| Berkeley | 63134, 63140, 63135 | Fiber up to 5 GIG |
| Breckenridge Hills | 63114, 63074, 63134 | Fiber up to 5 GIG |
| Brentwood | 63144, 63117, 63143 | Fiber up to 5 GIG |
| Bridgeton | 63044, 63042, 63045 | Fiber up to 5 GIG |
| Byrnes Mill | 63049, 63051, 63025 | Fiber up to 5 GIG |
| Cedar Hill | 63016, 63051, 63015 | Internet Air |
| Chesterfield | 63017, 63011, 63005 | Fiber up to 5 GIG |
| Clayton | 63105, 63117, 63130 | Fiber up to 5 GIG |
| Cottleville | 63304, 63368, 63376 | Fiber up to 5 GIG |
| Creve Coeur | 63141, 63131, 63146 | Fiber up to 5 GIG |
| Crystal City | 63019, 63048, 63070 | Fiber up to 5 GIG |
| Dardenne Prairie | 63368, 63304, 63367 | Fiber up to 5 GIG |
| De Soto | 63020, 63047 | Internet Air |
| Defiance | 63341, 63073, 63332 | Internet Air |
| Des Peres | 63131, 63122, 63141 | Fiber up to 5 GIG |
| Ellisville | 63011, 63021, 63040 | Fiber up to 5 GIG |
| Elsberry | 63343, 63330, 63347 | Internet Air |
| Eureka | 63025, 63069, 63040 | Fiber up to 5 GIG |
| Fenton | 63026, 63127, 63088 | Fiber up to 5 GIG |
| Ferguson | 63135, 63140, 63136 | Fiber up to 5 GIG |
| Festus | 63019, 63048, 63047 | Fiber up to 5 GIG |
| Florissant | 63031, 63033, 63042 | Fiber up to 5 GIG |
| Foley | 63347, 63389, 62006 | Internet Air |
| Foristell | 63348, 63390, 63385 | Internet Air |
| Frontenac | 63131, 63124, 63141 | Fiber up to 5 GIG |
| Gray Summit | 63039, 63055, 63089 | Internet Air |
| Hawk Point | 63349, 63381, 63379 | Internet Air |
| Hazelwood | 63042, 63044, 63031 | Fiber up to 5 GIG |
| Herculaneum | 63048, 63019, 63070 | Fiber up to 5 GIG |
| Hermann | 65041, 63014 | Internet Air |
| High Ridge | 63049, 63025, 63026 | Fiber up to 5 GIG |
| Hillsboro | 63050, 63047, 63023 | Internet Air |
| Imperial | 63053, 63012, 63052 | Fiber up to 5 GIG |
| Kirkwood | 63122, 63131, 63126 | Fiber up to 5 GIG |
| LaBarque Creek | 63015, 63016, 63069 | Check address |
| Lake St. Louis | 63367, 63368, 63385 | Check address |
| Lemay | 63125, 63123, 63111 | Fiber up to 5 GIG |
| Manchester | 63021, 63088, 63011 | Fiber up to 5 GIG |
| Marthasville | 63357, 63090 | Internet Air |
| Maryland Heights | 63146, 63043, 63045 | Fiber up to 5 GIG |
| Montgomery City | 63361, 63363 | Internet Air |
| Moscow Mills | 63362, 63379, 63369 | Internet Air |
| New Florence | 63363, 63350, 63361 | Internet Air |
| O Fallon | — | Fiber up to 5 GIG |
| Old Monroe | 63369, 63389, 63366 | Internet Air |
| Olivette | 63132, 63114, 63124 | Fiber up to 5 GIG |
| Overland | 63114, 63132, 63074 | Fiber up to 5 GIG |
| Pacific | 63069, 63039, 63055 | Internet Air |
| Pevely | 63070, 63048, 63019 | Internet Air |
| Portage Des Sioux | 62028, 63373, 62022 | Internet Air |
| Richmond Heights | 63117, 63105, 63144 | Fiber up to 5 GIG |
| Sappington | 63126, 63128, 63127 | Fiber up to 5 GIG |
| Silex | 63377, 63387, 63344 | Internet Air |
| St Peters | — | Fiber up to 5 GIG |
| St. Charles | 63045, 63303, 63044 | Fiber up to 5 GIG |
| St. Louis | 63108, 63110, 63103 | Fiber up to 5 GIG |
| Sullivan | 63080, 63079 | Internet Air |
| Town And Country | 63141, 63131, 63017 | Fiber up to 5 GIG |
| Troy | 63379, 63362 | Internet Air |
| Truxton | 63381, 63333, 63349 | Internet Air |
| Twin Oaks | 63088, 63021, 63011 | Fiber up to 5 GIG |
| Union | 63084, 63089, 63090 | Internet Air |
| University City | 63130, 63105, 63133 | Fiber up to 5 GIG |
| Valley Park | 63088, 63021, 63026 | Fiber up to 5 GIG |
| Villa Ridge | 63089, 63039, 63055 | Internet Air |
| Warrenton | 63380, 63383, 63390 | Internet Air |
| Washington | 63090, 63332 | Internet Air |
| Webster Groves | 63119, 63144, 63143 | Fiber up to 5 GIG |
| Weldon Spring | 63304, 63005, 63368 | Fiber up to 5 GIG |
| Wentzville | 63385, 63348, 63367 | Internet Air |
| Wildwood | 63038, 63040, 63005 | Fiber up to 5 GIG |
| Winfield | 63389, 63369, 63347 | Internet Air |
| Wright City | 63390, 63380, 63348 | 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.
636 Area Code Map
Area code 636 serves O'Fallon and nearby communities in MO.
↓ Printable PDF
Open the printable 636 map (PDF) · All Missouri area codes · Home internet in O'Fallon
Counties Covered by the 636 Area Code
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 636 also reaches parts of Franklin County, Lincoln County, Warren County, Crawford County, Gasconade County, Montgomery County.
Area Code 636: More Than a Number in O'Fallon
In O'Fallon, the 636 is more than digits on a caller ID. It arrived in 1999, carved out of the 314, and it has meant O'Fallon and surrounding communities ever since — 432 carrier prefixes keep its lines busy today, and an established 636 number still says you’ve been here a while.
The map tells its own story: O'Fallon and surrounding communities, with no overlay on its territory. The area and the code are still one and the same — rare in Missouri and getting rarer nationwide.
Keeping a 636 matters here. An existing 636 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 636: bring it to AT&TInternet, wireless & stores in the 636
AT&T Home Internet in Area Code 636
AT&T home internet serves communities across area code 636, 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.
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 636? AT&T Business Internet is available at many addresses.
Moving to Area Code 636?
Set up home internet in area code 636 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 636 number from anywhere, or keep your old number when you arrive. An AT&T store nearby can handle the whole switch in one visit.
AT&T Wireless in Area Code 636
AT&T’s 5G network covers most of area code 636. ActiveArmor® spam blocking is included with every unlimited plan, your 636 number stays yours, and great cell phone deals in O'Fallon are a tap away.
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 636 number? Ask when you activate a line, and porting an existing 636 number keeps it yours.
AT&T Stores in Area Code 636
Looking for cell phone stores in area code 636? These stores answer on 636 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.
All AT&T Stores with 636 Numbers
Every store below answers on a 636 number. Tap any number to call.
International Calling from Area Code 636
Calling abroad from area code 636? 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.
Top places of birth among foreign-born residents of the 636’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 636 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.
636 Area Code Quick Facts & Dialing
How to dial a 636 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 636 + 7-digit number | (636) 555-0100 |
| Long distance (within the U.S.) | 1 + 636 + 7-digit number | 1 (636) 555-0100 |
| Calling 636 from another country | +1 636 + 7-digit number | +1 636 555 0100 |
| From a mobile phone | (636) + 7-digit number | (636) 555-0100 |
A Short History of Area Code 636
Created in 1999 as a split from the 314, the 636 has meant O'Fallon and surrounding communities ever since. No splits or overlays have divided its territory since.
In service since 1999, with no overlay on its territory today.
Nearby & Related Area Codes
Browse area codes by state: Missouri (9) · California (41) · Texas (29) · Florida (23) · all 50 states ›
