671 covers Hagatna, Agana Heights, Santa Rita, on Chamorro time. Paste a 671 number to see whether it is valid, mobile or landline, and whether it has been reported.
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By number of exchanges assigned to each rate centre — where most 671 numbers were issued.
The carrier each block of numbers was assigned to. A number that has been ported keeps its digits and changes network, so this is where a 671 number started, not necessarily where it is today.
Between Aug 25, 2026 and Oct 15, 2026, consumers filed 4 complaints with the FTC about 4 different 671 numbers; 50% were recorded messages. A caller ID can be spoofed, so a complaint against a number is evidence about calls showing that number, not proof about its owner. How 671 compares with other area codes →
Calling a list of 671 numbers? Check up to 20 at once on the free call list cleaner — line type, carrier and complaint history for each — or one number on the spam phone checker.
671 is in Guam, United States. Its busiest exchanges are in Hagatna, Agana Heights, Santa Rita.
Chamorro (UTC−14).
Dial your exit code, then 1, then 671 and the seven-digit number: +1 671 XXX XXXX. Stored for a dialer or CRM, that is +1671XXXXXXX in E.164.
The area code says nothing on its own — spammers spoof local codes so the call looks familiar. In the FTC's complaint files since Aug 25, 2026, 4 different 671 numbers were reported. Check the exact number with the free lookup above.