NPA-NXX - 510-923
This is the 510-923 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!
The 510-923 subcode mainly covers Oakland in Alameda 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 At&t California. 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 1510271 comments across our systems for the 510-923 subcode.