Guam

Exit Code + 1 + 671 + The Number

The Guam country code is 671. The nationality of Guam is Guamanians.The capital of Guam is HagatnaLargest Cities in Guam by population: Dededo, Yigo, Tamuning, Mangilao, Barrigada, Santa Rita, Yona, Chalan-Pago-Ordot, Mongmong-Toto-Maite, Agat. Local Telephone Prefix: 1 is the trunk code for Guam