The 251 area code is located in the state of Alabama, and according to Intelius data, covers roughly 494,100 phone numbers and 697,747 listings across 532 prefixes.
This is a General Purpose Code, in service since June 18, 2001.
Area code 251 was split from area code 334.
Local calls within area code 251 require 10 digits dialing, while long-distance calls require 1 plus 10 digits dialing.
Have you received a call from a number with a 251 area code? Figure out who is calling you by performing a reverse phone lookup search. Intelius can provide you with a phone report that includes (when available) original line type and carrier, the number owner’s name, last known address and past addresses, age, possible relatives, and more.
| County Population (2025) | 267,761 |
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| County Population (2025) | 411,658 |
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| County Population (2025) | 33,688 |
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