Area Code 671: Hagatna (Agana), Guam
671 is a telephone area code serving Guam, including Hagatna (Agana). It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 671 are located in Guam, United States (NANP region: Territory). The code covers Hagatna (Agana).
How to Dial Area Code 671
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 671 XXX-XXXX (10-digit dialing: 671 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 671 XXX XXXX |
| From Australia | 0011 1 671 XXX XXXX |
| From a mobile phone anywhere | +1 671 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 671 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 671
Calls to a 671 number ring in the Pacific/Guam time zone, standard offset UTC+10:00. This zone does not observe daylight saving time, so the offset above holds all year.
Note: Guam does not observe daylight saving time.
Cities and Communities Served by 671
The following places fall inside the 671 calling area:
Other Area Codes in Guam
These codes also serve Guam. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|
See all 1 area codes in Guam →
Frequently Asked Questions
Where is area code 671?
Area code 671 is in Guam, United States. It covers Hagatna (Agana).
What time zone is area code 671 in?
Area code 671 rings in the Pacific/Guam time zone (UTC+10:00 standard).
Do I need to dial 1 before area code 671?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 671, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 671.
Is area code 671 toll-free?
No. 671 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.