NPA-NXX - 671-400

This is the 671-400 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. 671-400

The 671-400 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 Pacific Data Systems. 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 671-400 subcode.