Free calculators and unit converters for general and everyday use.
Calculators » Miscellaneous » Country Calling Codes » Guam
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can find IDD country calling code of Guam for making international phone calls from anywhere in the world.
Country calling code of Guam is +1 671
If your phone doesn't have the + key, you need to dial a access code (known as the international call prefix) in it's place. To know the call prefix for the calling country, select the "from country" field in the form or choose from the countries shown below:
Select the countries you are calling to/ making a call from: