Guam country code (prefix) or dialing code with an interactive map and travel information to explore Guam.
The + initiates an international call, followed by the country code (here 671 for Guam). Alternatively, in most countries (with some exceptions, for example, USA, Canada, Australia, and Russia) 00 can also be used to initiate a foreign call.
| +671 ... ....... | International format (recommended, always possible) | |
| 00 671 ... ....... | From most European countries | |
| 011 671 ... ....... | From the USA | |
| 011 671 ... ....... | From Canada | |
| 0011 671 ... ....... | From Australia | |
| 810 671 ... ....... | From Russia, Belarus, Georgia, Kazakhstan, Moldova, Tajikistan, Uzbekistan | |
| 119 671 ... ....... | From Cuba |