NPA-NXX - 313-420

This is the 313-420 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. 313
3. 313-420

The 313-420 subcode mainly covers Detroit in Wayne county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Michigan state. Many of the numbers in this subcode are Regular Landline registered to Long Distance Of Michigan. We hear they employ a large number of people in the Michigan office.
Recently there have been an increase in reported calls, we've had over 1820584 comments across our systems for the 313-420 subcode.