Area codes / Alabama / 251
The 251 area code
251 is an area code in Alabama, in the Central time zone. Get a local 251 number for your business, shared by everyone who answers it, or bring the 251 number you already have.
251 at a glance
- State
- Alabama
- Time zone
- Central
- In service since
- 2001
- Overlay
- None: the only code for its area
- Local calls
- Dialed with all ten digits (area code and number)
Get a 251 business number
When you sign up for Onyx Phone, you pick a local number by area code: search 251, narrow it by the next three digits or the last four if you want something memorable, and it's yours on the spot. Which numbers are free changes daily.
The number rings everyone you assign to it, in the browser, on the iPhone and Android apps, and on desk phones, and texts from it are unlimited once US carriers approve your business. Your plan includes one number for each user, and more numbers are $5 a month.
Calling 251 customers
Local calls in 251 are dialed with all ten digits: the area code, then the number. Callers are on Central time, so set your business hours to match if most of your customers are here.
Calls from Onyx Phone show your business number, and once your business is verified, your caller ID name too, so 251 customers see who's calling.
Questions about area code 251
What state is area code 251?
Area code 251 is in Alabama.
What time zone is area code 251 in?
Area code 251 is in the Central time zone.
Is 251 an overlay area code?
No. Today 251 is the only area code for its part of Alabama.
Can I get a 251 business number?
Onyx Phone sells US local numbers. When you pick your number, search the 251 area code; which numbers are free changes daily.
Can I keep the 251 number I already have?
Yes. Moving a number to Onyx Phone is free on every plan and usually takes 3 to 7 business days. You answer on a temporary number until it moves.
Included on every plan
Starter is $17, Business is $29, Scale is $42 per user a month, or less billed yearly. The plan includes a business number for each user and unlimited calling and texting in the US and Canada. Every plan starts with a 7-day free trial, and moving your current number over is free.
Area code data from the North American Numbering Plan Administrator (NANPA), file of October 24, 2026.