Calling Guam from the United States explained:
- 011 - US exit code; have to be dialed first for all international calls made from the US/Canada number plan
- 1 - international country code for Guam
- US to Guam international dialing format : 011 + 1 + individual phone number
Information about country:
Guam, officially the Territory of Guam, is an island in the western Pacific Ocean and is an organized, unincorporated insular area of the United States. It is one of five U.S. territories with an established civilian government. The island's capital is Haga. Guam is the largest and southernmost of the Mariana Islands.