NPA-NXX - 559-310

This is the 559-310 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. 559
3. 559-310

The 559-310 subcode mainly covers Porterville in Tulare 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 Cellular (Dedicated) registered to At&t Mobility. 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 442179 comments across our systems for the 559-310 subcode.