NPA-NXX - 530-640

This is the 530-640 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. 530
3. 530-640

The 530-640 subcode mainly covers Alturas in Modoc 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 U.s. Cellular. 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 9686 comments across our systems for the 530-640 subcode.