NPA-NXX - 317-399

This is the 317-399 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. 317
3. 317-399

The 317-399 subcode mainly covers Westfield in Hamilton county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Indiana state. Many of the numbers in this subcode are Regular Landline registered to Tw Telecom. We hear they employ a large number of people in the Indiana office.
Recently there have been an increase in reported calls, we've had over 274569 comments across our systems for the 317-399 subcode.