North American Numbers
State · 1 area codes
Guam area codes
Guam uses area code 671, serving Hagåtña and the surrounding villages.
A · Metros
Major metro areas
Hagåtña Tamuning Dededo
B · Directory
All Guam area codes
Every code opens its profile — codes with a full write-up show their place; the rest show live numbering data while their detailed profile is added.
Sources
NANPA ↗
Area code assignment for Guam (671) — primary
Compiled by North American Numbers, last checked 2026-09-18. How this is made.