NPA-NXX - 917-399

This is the 917-399 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. 917
3. 917-399

The 917-399 subcode mainly covers New York City in New York 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 At&t Mobility. 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 1585873 comments across our systems for the 917-399 subcode.