Area code 251

About area code 251

Area code 251 is a geographic area code in Alabama, in service since June 18, 2001, according to the North American Numbering Plan Administrator (NANPA). It is not part of an overlay, so every number in its territory starts with 251. It is in the Central time zone. The places with the most assigned exchanges include Mobile, Foley, Atmore, Jackson, and Fairhope. By population, its largest named places are Mobile, Foley, Fairhope, Bay Minette, and Atmore.

Places served by 251

251 holds 16% of the 3,264 central office codes assigned in Alabama, the 4th most of the state's 7 codes. 27 Census places could be matched to rate centers with 251 exchanges; the most populous are Mobile (201,000), Foley (28,043), Fairhope (26,044), and Bay Minette (8,505). For a storefront or service area inside 251, the place pages show which prefixes are rated local there.

Ten-digit and seven-digit dialing in 251

According to NANPA's dialing-plan data, local calls within 251 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere. NANPA's dialing-plan note for this code reads: "Other dialing plans may apply at the discretion of the local service provider. 1+10 digit permissible at service provider discretion."

Carriers with 251 numbers

48 carriers hold the 528 central office codes assigned in 251. Bellsouth Telecomm INC d/b/a South Central Bell Tel has the most, with 87 (16%). 396 of the codes (75%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Local calling areas in 251

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 251 has codes in 42 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

How full is area code 251?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 528 are assigned in 251, 66% of 800. 148 were assigned in 2020 or later.

Getting a 251 number for your business

Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.

If you already have a number in area code 251, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.