NPA-NXX - 315-921

This is the 315-921 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. 315
3. 315-921

The 315-921 subcode mainly covers Watertown in Jefferson county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of New York state. Many of the numbers in this subcode are Cellular (Dedicated) registered to T-mobile. We hear they employ a large number of people in the New York office.
Recently there have been an increase in reported calls, we've had over 116229 comments across our systems for the 315-921 subcode.