NPA-NXX - 671-637

This is the 671-637 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. 671
3. 671-637

The 671-637 subcode mainly covers Agana in Guam county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Guam state. Many of the numbers in this subcode are Regular Landline registered to Gta Telecom. We hear they employ a large number of people in the Guam office.
Recently there have been an increase in reported calls, we've had over -1 comments across our systems for the 671-637 subcode.