Area Code
Guam, United States
Local Time
1:50 AM
Chamorro Time
Area Code
671
State / Province
Guam
Country
United States
Time Zone
Chamorro Time
Area code 671 covers 1 rate center across Guam. Rate centers are geographic areas used by telephone companies to determine local calling boundaries.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+16715550100">+16715550100</a><a href="tel:+16715550199">+16715550199</a>Area code 671 is a North American Numbering Plan (NANP) telephone area code assigned to Guam, United States. It is the sole area code assigned to Guam, covering the entire state or province under a single numbering plan area.
Yes. 671 is an active North American Numbering Plan (NANP) area code, currently assigned to Guam, United States. It is safe to answer or dial calls using this area code.
Area code 671 covers 1 rate centers across Guam. Communities served include Agana. Rate centers are the geographic building blocks telephone carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 671 area code observe Chamorro Time (IANA timezone: Pacific/Guam). When placing a call to a 671 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Guam, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 671 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 671 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 671 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +16715550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.