NPA-NXX - 303-558

This is the 303-558 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. 303
3. 303-558

The 303-558 subcode mainly covers Brighton in Adams county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Colorado state. Many of the numbers in this subcode are Regular Landline registered to Global Crossing. We hear they employ a large number of people in the Colorado office.
Recently there have been an increase in reported calls, we've had over 441603 comments across our systems for the 303-558 subcode.