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Guam Calling Codes

Calling Code:+1 671
= the calling code for Guam is +1 671.
International Call Prefix:
(dial out code)
National Trunk Prefix:*1
Telephone Digits:7 digits
How to call or text Guam from abroad or internationally?

To call or text Guam's telephone number from abroad you must use the plus sign (+) or exit code of the country you are dialing from. Eg: To call Guam from the U.S., just dial:

Using plus sign:
(+) (International Code) (Phone Number)
+ 1 671 xxxxxxx

Using Exit Code:
(Exit Code Prefix) (International Code) (Phone Number)
(011)1 671- xxxxxxx

Timezone:UTC+10:00 (ChST)