Guam +1 671
To call Guam from abroad, dial your exit code (or +), then 1 671, then the local number without its leading 1. Written in full: +1 671-300-1234.
The country calling code for Guam is +1. A number starting +1 or 001 is a call to or from Guam. From abroad: +1 671-300-1234.
To call Guam from abroad, dial your exit code (or +), then 1, then the local number without its leading 1. The +1 code identifies the country; the following digits identify the line (landline or mobile).
How to call Guam from abroad
011 1 671-300-123400 1 671-300-12340011 1 671-300-1234+1 671-300-1234671-300-1234 is a real-format Guam mobile number (example from the ITU-T numbering plan): replace it with the number you were given, without its leading 1.
Guam area codes
In Guam, landlines usually include an area code after +1 (without its leading 1). Mobiles have no area code.
Number format
(671) 300-1234from abroad+1 671-300-1234(671) 300-1234from abroad+1 671-300-1234Landline numbers in Guam have 10 digits after the country code; mobile numbers have 10 digits and start with 671. The national prefix 1 is only dialled inside the country — drop it after +1.
Calling abroad from Guam
To call another country from Guam, dial the exit code 011 (or + on a mobile), then the country code, then the number. From Guam to the United States, for example: 011 1 201 555 0123.
A Guam number in international format is written +1 …. The + stands for the exit prefix (00 in much of the world, 011 in North America). Switching to international format, drop the leading 1.
Cheapest ways to call Guam
With internet on both ends, apps like WhatsApp, Signal or FaceTime call Guam for free. To reach a number without an app, VoIP services are usually cheaper than your operator’s international rate.
Frequently asked questions
What country has the code +1?
Guam has the country calling code +1.
How do I call Guam from the United States?
Dial 011, then 1, then the local number without its leading 1 — for example 011 671-300-1234.
What does +1 mean?
It is the international dialing code for Guam. The + stands for your exit code (00 in much of the world, 011 in North America).
Is +1 mobile or landline?
The +1 code identifies the country, not the line type; Guam landlines and mobiles share it.
A country code covers a whole nation; the full number depends on the city and operator.
Mobile network codes in Guam
Every mobile network is identified by a mobile country code (MCC) and a mobile network code (MNC). They appear on your phone when it roams, in SIM settings and in any network lookup. Guam has 3 network operators with their own infrastructure:
| Network | MCC-MNC | Technologies | Subscribers |
|---|---|---|---|
| IT&EPTI Pacifica Inc. | 310-032 | 2G · 3G · 4G | — |
| Docomo PacificNTT Docomo | 310-370 | 2G · 3G · 4G · 5G | — |
| GTATeleGuam Holdings LLC | 310-140 | 2G · 3G · 4G · 5G | — |
A struck-through generation has been switched off on that network. MCC-MNC: ITU-T E.212 codes as listed on Wikipedia.
Received a call from a Guam number? Check it with the phone number lookup: type of line, format and local time.
Source: Wikipedia — lists of mobile network operators, mobile network codes, 2G and 3G phase-out, mobile number portability (CC BY-SA 4.0). Subscriber counts as published by each operator or regulator at the date shown.