NPA-NXX - 925-839

This is the 925-839 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. 925
3. 925-839

The 925-839 subcode mainly covers Martinez in Contra Costa county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of California state. Many of the numbers in this subcode are Regular Landline registered to U.s. Telepacific Corporation. We hear they employ a large number of people in the California office.
Recently there have been an increase in reported calls, we've had over 1049025 comments across our systems for the 925-839 subcode.