Guam Phone Number Lookup

Verify Guam Phone Numbers - Country Code +1-671

Our phone number lookup tool above instantly verifies whether a phone number belongs to Guam by analyzing its country code and number format. Guam phone numbers use the country code +1-671 and follow an (671)+7 digits national format.

Country:	Guam (GU, GUM)
Country Calling Code:	+1-671
National Number Format:	(671)+7 digits
Example Number:	+1 671 688 1234
International Dialing Prefix:	011
National Trunk Prefix:	1
Time Zone (UTC/DST):	+10
Regulator:	-

Reverse Phone Lookup

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Calling from Guam to the United States

To call United States from Guam, follow this exact dialing sequence:

• 011 - Guam's international access code
• 1 - United States country code
• Area Code - Specific U.S. area code
• 7-digit number - The local phone number

Example: To call (312) 555-0123 from Guam, dial: 011 1 312 555 0123