Guam phone number format and +1 671 destination prefix
Guam shares +1 with other destinations in the North American Numbering Plan. Its destination prefix is +1 671; +1 alone does not identify Guam. Retain and verify the full area code and local number.
Use Voipfibre after checking the number format
+1 671 + seven-digit local number
How to dial Guam
Start with shared calling code +1, add 671 as the Guam area code, then enter the seven-digit local number. Use the format shared by the person or business you are calling when available.
Country code
+1
Guam shares +1 and uses area code 671, producing destination prefix +1 671.
Number format
671 area code + seven-digit local number
Guam shares +1 through the North American Numbering Plan. Use +1 671, then the seven-digit local number; +1 alone does not identify Guam.
Before calling
The bracketed patterns are format placeholders, not assigned or working numbers. Confirm the complete number and its type, then check the live Voipfibre rate because availability and prices can differ.
Check Guam ratesFormat the number before checking the rate
These steps work whether you are calling from the United States, the United Kingdom, India, the United Arab Emirates or another country.
- 1
Start with +1
Guam shares the North American Numbering Plan country calling code +1.
- 2
Add area code 671
Put 671 immediately after +1, producing destination prefix +1 671.
- 3
Complete the seven-digit local number
After +1 671, enter the confirmed seven-digit Guam local number.
- 4
Check the rate before calling
The bracketed patterns are format placeholders, not assigned or working numbers. Confirm the complete number and its type, then check the live Voipfibre rate because availability and prices can differ.
Mobile and landline examples
Examples are for formatting guidance only. Always confirm the exact number with the person or business you are calling.
Mobile example
+1 671 [seven-digit local number]
Useful when you are calling a Guam mobile number.
Landline example
+1 671 [seven-digit local number]
Useful when you are calling a Guam landline or area-based number.
What to check before using the +1 671 destination prefix
Country codes are only one part of an international phone number. Exit codes, area codes, mobile prefixes, and local numbering rules can change how the final number should be dialed.
Exit code or plus format
On a mobile phone, the plus sign usually replaces exit codes such as 00 or 011. Use +1, area code 671, and then the seven-digit local number.
Country calling code, dial code, or prefix
Guam shares country calling code +1; 671 is its area code. Use the complete destination prefix +1 671, then the seven-digit local number.
Mobile phone or landline
After +1 671, enter the seven-digit local number. Check whether the destination is mobile, landline, or a special service because rates can differ.
Guam calling code +1 and area code 671
Guam shares +1 with other destinations in the North American Numbering Plan. Its destination prefix is +1 671; +1 alone does not identify Guam. Retain and verify the full area code and local number.
Number-format guardrail
Number lengths, prefixes, and domestic trunk rules can vary by number type. The bracketed patterns on this page deliberately avoid presenting fabricated working numbers.
After checking the country code
Continue with rates, app calling, and related dialing guides.
Popular guides for calling Guam
Use the +1 671 format first, then compare free calling offers, rate checks, and calling options for regular phone numbers from common origin countries.