NPA-NXX - 513-603

This is the 513-603 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. 513
3. 513-603

The 513-603 subcode mainly covers Hamilton in Butler county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Ohio state. Many of the numbers in this subcode are Regular Landline registered to Cincinnati Bell. We hear they employ a large number of people in the Ohio office.
Recently there have been an increase in reported calls, we've had over 368130 comments across our systems for the 513-603 subcode.