Every number type in Guam with real format examples: how numbers are written domestically, how to dial them from abroad, and the E.164 form your systems should store.
Right now in Guam
--:--
Country code
+1
Trunk prefix
1
Intl. call prefix
011
Mobile digits
10
Number formats by type
Examples from the official numbering plan metadata. The E.164 column is the normalized form for databases and APIs.
Type
Domestic (national)
From abroad
E.164
Digits
Landline
6713001234
+1 6713001234
+16713001234
10
Mobile
6713001234
+1 6713001234
+16713001234
10
Toll-free
8002123456
+1 8002123456
+18002123456
10
Premium rate
9002123456
+1 9002123456
+19002123456
10
How to call Guam
From abroad: dial +1 (or your country's exit code, e.g. 00 from Europe, 011 from North America), then the national number without the leading 1. Example: +1 6713001234
Within Guam: dial the number as written domestically, including the trunk prefix 1. Example: 6713001234
Calling abroad from Guam: the international prefix is 011, or simply use + on mobiles.
Storing numbers in software: always store E.164 (+16713001234): unambiguous, sortable, and what SMS and telephony APIs expect.
Exact dial sequence from your country
Pick where you are calling from and get the digit-for-digit sequence for a Guam number, with your country's exit code instead of the generic +.
Dial exactly
Frequently Asked Questions
What is the phone number format in Guam?
Numbers in Guam use country code +1. A mobile number looks like 6713001234 domestically, or +1 6713001234 in international format (E.164: +16713001234). Mobile numbers have 10 national digits.
How do I call Guam from abroad?
Dial your country's international prefix (or +), then 1, then the national number without the leading 1. Example: +1 6713001234.
What is the country calling code for Guam?
The country calling code for Guam is +1. To call abroad from Guam, the international prefix is 011 (or use +).
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