Who called me from area code 837?
- 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 prefixes from the region, right on this page.
- Curious who issued a number? Every assigned prefix belongs to a carrier - the registry will name each 837 prefix as it comes into service.
No 837 spam patterns have been reported yet: the code is too new. Spoofers imitate the established local codes first, so the current patterns below come from the 530 board.
187 unwanted-call reports naming 837 numbers in FTC Do Not Call complaint data, July 29 – August 13, 2026. Consumer-reported and unverified.
Block spam calls from area code 837 with AT&T ActiveArmor®
Network-level security that screens the calls this page is about - included with AT&T wireless plans:
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- Suspected spam labeled before you answer
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- Reverse number lookup
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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.
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Is area code 837 a scam?
It went live in January 2025 as the newest layer over the Chico region, serving the exact same territory as 530. 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 837 numbers
The most common area code 837 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:
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 837
Caller ID is easy to forge. Spoofing fakes the number a call displays. The real owner of that 837 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 837 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 837 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.
837 area code prefix & carrier lookup
The three digits after the area code identify the carrier a number was issued to. 837 is so new that few or no carrier prefixes are in service yet: the registry below shows the standard service codes every area code reserves. Carrier prefixes will appear here as numbers ship; the guide 530 board shows what a mature registry for this region looks like.
This isn’t a reverse phone lookup: no legitimate free service can tell you who owns a specific number. What a prefix does show, once assigned: the carrier that issued it, whether it’s wireless, landline or VoIP, and the community it belongs to.
0 carrier prefixes in the registry yet · checked monthly
| Prefix | Assignment | Line type |
|---|---|---|
| 837-211 | Community services | Service code |
| 837-311 | City services | Service code |
| 837-411 | Directory assistance | Service code |
| 837-511 | Traffic information | Service code |
| 837-555 | Reserved (directory / fictional use) | Service code |
| 837-611 | Carrier customer service | Service code |
| 837-700 | Carrier-specific services | Service code |
| 837-711 | Telecommunications relay | Service code |
| 837-811 | Call before you dig | Service code |
| 837-911 | Emergency services | Service code |
| 837-950 | Carrier access (reserved) | Service code |
| 837-958 | Network testing (reserved) | Service code |
| 837-959 | Network testing (reserved) | Service code |
| 837-976 | Premium services (reserved) | Service code |
Cities & Communities in and around Area Code 837
From Alta to Anderson and Auburn, these are the communities that call the 837 home. Each city below shows its key ZIP codes, the internet service available there, and a link to local AT&T details.
| City / community | Key ZIP codes | AT&T internet |
|---|---|---|
| Alta | 95701, 95714, 95717 | Check address |
| Anderson | 96007, 96002 | AT&T Internet Air |
| Auburn | 95603, 95658, 95614 | Fiber up to 5 GIG |
| Beale Afb | 95903, 95692, 95977 | AT&T Internet Air |
| Berry Creek | 95916 | Check address |
| Biggs | 95917, 95948, 95974 | AT&T Internet Air |
| Blairsden | 96103, 96106, 96122 | Check address |
| Burney | 96013 | AT&T Internet Air |
| Butte Valley | 95969, 95965 | Check address |
| Camino | 95709, 95667 | AT&T Internet Air |
| Camptonville | 95922, 95960, 95925 | Check address |
| Carnelian Bay | 95604, 96140, 96148 | AT&T Internet Air |
| Castella | 96025, 96017 | Check address |
| Chico | 95926, 95929, 95928 | Fiber up to 5 GIG |
| Cohasset | 95942, 95973 | Check address |
| Colfax | 95713, 95736, 95717 | AT&T Internet Air |
| Colusa | 95932 | Fiber up to 1 GIG |
| Corning | 96021, 96090, 96035 | AT&T Internet Air |
| Cottonwood | 93304, 93305, 93301 | AT&T Internet Air |
| Davis | 95618, 95616 | Fiber up to 5 GIG |
| Dixon | 95620, 95616, 95625 | Fiber up to 5 GIG |
| Dobbins | 95935, 95962, 95919 | Check address |
| Downieville | 95936, 95944 | AT&T Internet Air |
| Dunnigan | 95937, 95698 | Check address |
| Dunsmuir | 96025, 96067 | AT&T Internet Air |
| Durham | 95938, 95928, 95958 | AT&T Internet Air |
| Dutch Flat | 95714, 95701, 95717 | Check address |
| East Nicolaus | 95659, 95674, 95668 | Check address |
| Edgewood | 96094 | Check address |
| El Macero | 95618, 95616, 95691 | Check address |
| Esparto | 95653, 95627 | AT&T Internet Air |
| Floriston | 96111, 89511 | AT&T Internet Air |
| Forest Ranch | 95942, 95954, 95978 | Check address |
| Georgetown | 95635, 95633, 95634 | AT&T Internet Air |
| Gerber | 96078, 96035, 96090 | Check address |
| Goodyears Bar | 95944, 95936, 95910 | Check address |
| Grass Valley | 95945, 95975 | AT&T Internet Air |
| Grenada | 96038 | AT&T Internet Air |
| Gridley | 95948, 95917 | AT&T Internet Air |
| Hamilton City | 95951 | AT&T Internet Air |
| Hornbrook | 96044 | AT&T Internet Air |
| Igo | 96001, 96047 | Check address |
| Kings Beach | 96143, 89402, 96148 | AT&T Internet Air |
| Knights Landing | 95676, 95697, 95776 | Check address |
| Lewiston | 96052, 96093 | AT&T Internet Air |
| Linda | 95961, 95901, 95993 | Fiber up to 5 GIG |
| Live Oak | 95062, 95010, 95065 | AT&T Internet Air |
| Loma Rica | 95918, 95914, 95962 | Fiber up to 5 GIG |
| Los Molinos | 96090, 96035, 96078 | AT&T Internet Air |
| Loyalton | 96118, 96105 | AT&T Internet Air |
| Magalia | 95954, 95969, 95942 | Fiber up to 5 GIG |
| Marysville | 95901, 95993, 95961 | Fiber up to 5 GIG |
| Meadow Vista | 95722, 95703, 95602 | AT&T Internet Air |
| Meridian | 95982, 95950, 95957 | AT&T Internet Air |
| Montague | 96097 | AT&T Internet Air |
| Montgomery Creek | 96065, 96084 | Check address |
| Mount Shasta | 96067 | AT&T Internet Air |
| Nevada City | 95945, 95975 | AT&T Internet Air |
| Nicolaus | 95659, 95674, 95668 | AT&T Internet Air |
| North San Juan | 95935, 95960, 95922 | AT&T Internet Air |
| Olivehurst | 95961, 95991, 95993 | Fiber up to 5 GIG |
| Orland | 95963 | AT&T Internet Air |
| Oroville | 95968, 95965, 95966 | AT&T Internet Air |
| Palermo | 95968, 95966, 95914 | AT&T Internet Air |
| Palo Cedro | 96073, 96002, 96062 | AT&T Internet Air |
| Paradise | 95969, 95954 | Fiber up to 5 GIG |
| Paskenta | 96074, 96029 | Check address |
| Penn Valley | 95946, 95975, 95977 | AT&T Internet Air |
| Placerville | 95667, 95619, 95709 | AT&T Internet Air |
| Plumas Lake | 95991, 95961, 95674 | Fiber up to 5 GIG |
| Portola | 96122, 96129, 96106 | Check address |
| Princeton | 95970, 95920 | AT&T Internet Air |
| Proberta | 96078, 96035, 96090 | Check address |
| Quincy | 95971 | Check address |
| Rackerby | 95972, 95914, 95966 | Check address |
| Red Bluff | 96078 | AT&T Internet Air |
| Redding | 96002, 96001, 96003 | Fiber up to 5 GIG |
| Rio Oso | 95674, 95991, 95961 | AT&T Internet Air |
| Rough And Ready | 95975, 95946 | Check address |
| Sacramento | 95816, 95817, 95819 | Fiber up to 5 GIG |
| Shasta | 96001, 96087, 96019 | Fiber up to 5 GIG |
| Shasta Lake | 96019, 96003, 96001 | AT&T Internet Air |
| Sheridan | 95681, 95648, 95692 | AT&T Internet Air |
| Sierra City | 96125, 95936 | Check address |
| Smartsville | 95977, 95946, 95918 | AT&T Internet Air |
| Soda Springs | 95728 | Check address |
| Spring Garden | 95971 | Check address |
| Susanville | 96130 | AT&T Internet Air |
| Sutter | 95982, 95993, 95953 | AT&T Internet Air |
| Tahoe Vista | 96148, 95604, 96143 | AT&T Internet Air |
| Tehama | 96090, 96035, 96078 | Check address |
| Trowbridge | 95674, 95659, 95668 | Check address |
| Truckee | 96161 | Fiber up to 5 GIG |
| Vina | 96092, 96090 | Check address |
| Weed | 96094, 96067 | AT&T Internet Air |
| West Sacramento | 95605, 95818, 95814 | Fiber up to 5 GIG |
| Wheatland | 95692, 95681, 95903 | Fiber up to 5 GIG |
| Willows | 95988, 95913 | AT&T Internet Air |
| Winters | 95694 | Fiber up to 5 GIG |
| Woodland | 95776, 95697, 95695 | Fiber up to 5 GIG |
| Yreka | 96097 | AT&T Internet Air |
| Yuba City | 95993, 95961 | Fiber up to 5 GIG |
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.
837 area code map
Coverage area
Area code 837 covers the Chico area: Alpine, Butte, Colusa, Del Norte, El Dorado, Glenn, Lassen, Modoc and 11 more counties. Hover the map for each one.
Overlay codes
One more code, 530, covers the exact same territory as 837. Its full guide is linked in the Nearby section below.
Major cities
Roseville, Chico, Redding, Davis, Yuba City, Rocklin.
Your code is the blue pill. Hover any neighbor to see its code; tap to open it.
Counties covered by the 837 area code
All 19 counties: Alpine, Butte, Colusa, Del Norte, El Dorado, Glenn, Lassen, Modoc, Nevada, Placer, Plumas, Shasta, Sierra, Siskiyou, Sutter, Tehama, Trinity, Yolo, Yuba.
Counties are served in whole or in part; population is U.S. Census Bureau ACS 2023. The 837 also reaches parts of Santa Cruz County, Yolo County, Butte County, El Dorado County, Shasta County, Nevada County, Sutter County, Yuba County and 8 more.
Area code 837: more than a number in Chico
In Chico, a new area code is a population milestone. The 837 went live in January 2025, the second code layered over the same territory as 530, and the clearest sign yet of how the region keeps growing. Carrying one today marks you as one of the area’s newest arrivals: the numbers are only beginning to ship.
The map tells its own story: Chico and surrounding communities, one territory now served by 530 together with 837. Nothing about the coverage changes; the region simply has a deeper pool of numbers.
Keeping a 837 matters here. An existing 837 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 837: bring it to AT&T
Internet, wireless & stores in the 837
AT&T home internet in area code 837
AT&T home internet serves communities across area code 837, 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 837? AT&T Business Internet is available at many addresses.
Moving to area code 837?
Set up home internet in area code 837 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 837 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 837
AT&T’s 5G network covers most of area code 837. ActiveArmor® spam blocking is included with every unlimited plan, your 837 number stays yours, and great cell phone deals in Chico 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 837 number? Ask when you activate a line, and porting an existing 837 number keeps it yours.
Get a 837 phone number
New 837 numbers are issued as existing numbers recycle back into the pool. When you activate a new line, personal or business, you can pick your area code during activation. Already have one you love? Porting protects it when you switch.
For you
Pick a 837 during new-line activation - in the app or in a store. Moving to Chico? Port your number in, or start fresh with a local one.
Shop AT&T wireless plans ›For your business
A 837 number on your signage and caller ID reads as established in Chico - and local numbers see higher answer rates than out-of-area or toll-free lines.
Explore Business wireless ›AT&T stores in area code 837
Looking for cell phone stores in area code 837? These stores answer on 837 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 in the 837 region
Every store below answers on a local 530-region number. Tap any number to call.
International Calling from Area Code 837
Calling abroad from area code 837? 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.
Calling area code 837 from overseas? Dial your country’s exit code, then 1 837 and the number - full steps in How to dial a 837 number.
Top places of birth among foreign-born residents of the 837’s counties, U.S. Census Bureau ACS 2023.
Calling abroad from a 837 number: dial 011 + country code + number (or just + on a mobile).
International Calling and International Day Pass® availability, rates and included destinations vary by plan; see att.com for the current country list.
Traveling abroad instead? International Day Pass® takes your AT&T wireless talk, text and data with you for a flat daily rate. Not an AT&T wireless customer yet? Try AT&T Wireless℠ free for 30 days.
837 area code quick facts & dialing
How to dial a 837 number
| Scenario | Format | Example |
|---|---|---|
| Local call (within the region) | 837 + 7-digit number | (837) 555-0100 |
| Long distance (within the U.S.) | 1 + 837 + 7-digit number | 1 (837) 555-0100 |
| Calling 837 from another country | +1 837 + 7-digit number | +1 837 555 0100 |
| From a mobile phone | (837) + 7-digit number | (837) 555-0100 |
A short history of area code 837
Approved as numbering relief for the 530 region and live since January 2025, 837 is the second code to serve this territory. It exists for one reason: the region keeps growing, and the 530 pool of assignable numbers was running low.
Area code 837 vs the related codes
| Code | Added | Type | Where it works |
|---|---|---|---|
| 837 | 2025 | Overlay | Chico and surrounding communities |
| 530 | 1997 | Original | Same territory as 837 |
Same rates, same local dialing: a number from any code in the region works exactly like a 837.
Nearby & related area codes
Browse area codes by state: California (41) · Texas (29) · Florida (23) · all 50 states ›
