NPA-NXX - 520-558

This is the 520-558 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. 520
3. 520-558

The 520-558 subcode mainly covers Portal in Cochise county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Arizona state. Many of the numbers in this subcode are Regular Landline registered to Valley Telephone Cooperative. We hear they employ a large number of people in the Arizona office.
Recently there have been an increase in reported calls, we've had over 131346 comments across our systems for the 520-558 subcode.