NPA-NXX - 513-721

This is the 513-721 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. 513-721

The 513-721 subcode mainly covers Cincinnati in Hamilton 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 802374 comments across our systems for the 513-721 subcode.