Alabama · Central Time
251 Area Code
The 251 area code is a telephone area code in Alabama, covering Mobile and the surrounding area. It lies in the Central Time zone.
Last updated June 5, 2026
Where is the 251 area code?
251 serves Mobile and nearby communities in Alabama. In the wider directory it sits in the South region.
Dialing 251
Mobile is currently served by the single area code 251. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
History of the 251 area code
251 is a geographic area code serving Mobile and the surrounding part of Alabama. It was added after the original 1947 plan as telephone demand grew. For how codes are created, split, and overlaid, see how area codes work.
Is 251 a scam or spam risk?
251 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 251 number on your screen is no guarantee the caller is local or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Alabama area codes
Explore more
See every code in Alabama, compare codes across the South region, or view all Central Time codes. You can also browse the 2XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
251 area code FAQ
Where is the 251 area code?
The 251 area code is in Alabama, serving Mobile and the surrounding area in the South region.
What time zone is 251 in?
251 is in the Central Time zone.
Do I have to dial 10 digits for 251?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 251 a toll-free or premium code?
No. 251 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.