NPA-NXX - 667-312

This is the 667-312 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. 667
3. 667-312

The 667-312 subcode mainly covers Baltimore in Baltimore county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Maryland state. Many of the numbers in this subcode are Regular Landline registered to Atlantech Online Inc. We hear they employ a large number of people in the Maryland office.
Recently there have been an increase in reported calls, we've had over 620961 comments across our systems for the 667-312 subcode.