All dialing codes
Guam country code
To call Guam from abroad, dial your exit code, then +1, then the local number.
Country code
+1
How to dial Guam
From the US or Canada1 671 300 1234
From the UK and most of Europe00 1 671 300 1234
From Australia0011 1 671 300 1234
From Japan010 1 671 300 1234
From any mobile phone+1 671 300 1234
The example uses a Guam mobile number, written locally as (671) 300-1234. There's no leading digit to leave out: dial the full local number after the country code.
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Frequently asked question
What is the country code for Guam?
The country code for Guam is +1. From abroad, dial your exit code (00 from most countries, 011 from the US and Canada), then +1 without the plus sign, then the local number.