256 area code — Huntsville, AL geographic

Data: NANPA public reports, current as of July 28, 2026.

256 is the area code for Huntsville, Alabama, in service since March 23, 1998, Central time. The same territory is also served by its overlay code (256/938 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.

The code currently holds 785 working prefixes, held by 52 different carriers. Of these, 579 are pooled prefixes shared by multiple carriers. Numbers are anchored to 91 rate centers — billing localities that fix where each prefix belongs.

Practical takeaway: the 256 label narrows geography to Alabama, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.

Local calls inside 256 are dialed 10D; 1+10 digit permissible at service provider discretion.

The current NANPA exhaust forecast for the 256/938 complex is 2Q 2043.

The code was carved out of 205 (1998). As demand grew it in turn gave rise to 938 (2010).

Largest localities in 256

FAQ

Will 256 run out of numbers?

NANPA's current forecast projects exhaust in 2Q 2043 — decades of capacity remain.

Why am I getting spam calls from 256 numbers?

Scammers spoof recognizable area codes so calls look local or familiar. A displayed 256 number does not prove the call originated there — see our guide to spotting spoofed calls.

Where is a 256 number from?

256 is assigned to Huntsville and surrounding areas of Alabama in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.

Is 256 a toll-free number?

No. 256 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.