NPA-NXX - 251-666

This is the 251-666 subcode (NPA-NXX) prefix page. Follow a prefix to find the number you are looking for. We divide our pages up to make them more user friendly to navigate!

1. Area Codes
2. 251
3. 251-666

The 251-666 subcode mainly covers Mobile in Mobile county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Alabama state. Many of the numbers in this subcode are Regular Landline registered to At&t Southeast. We hear they employ a large number of people in the Alabama office.
Recently there have been an increase in reported calls, we've had over 412992 comments across our systems for the 251-666 subcode.