NPA-NXX - 563-503

This is the 563-503 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. 563
3. 563-503

The 563-503 subcode mainly covers Clinton in Clinton county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Iowa state. Many of the numbers in this subcode are Miscellaneous registered to Sprint. We hear they employ a large number of people in the Iowa office.
Recently there have been an increase in reported calls, we've had over 49116 comments across our systems for the 563-503 subcode.