NPA-NXX - 813-503

This is the 813-503 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. 813
3. 813-503

The 813-503 subcode mainly covers Tampa-central in Hillsborough county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Florida 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 Florida office.
Recently there have been an increase in reported calls, we've had over 1229226 comments across our systems for the 813-503 subcode.