Northern Mariana Islands Country Code: +1-670
The country code for Northern Mariana Islands is +1-670
Country code +1-670 is for Northern Mariana Islands
Quick Reference
Number Formats
+1-670-XXX-XXXXStarts with No separate mobile prefix
+1-670-XXX-XXXXStarts with No separate landline prefix
Major Cities & Area Codes
670Largest city and capital district
Dial: +1-670 670 XXX XXXX
670Second largest island
Dial: +1-670 670 XXX XXXX
670Third largest island
Dial: +1-670 670 XXX XXXX
Quick Tips
- All Northern Mariana Islands numbers use the same 670 area code.
- Dial 1-670 from mainland US, just like calling another state.
- Local calls within the islands require only the 7-digit number.
- Mobile and landline numbers look identical in format.
Important Note
Northern Mariana Islands uses the North American Numbering Plan. No distinction between mobile and landline number formats.
Complete Dialing Guide
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