Calling Northern
Mariana Islands from the United States explained:
- 1 - country code for Northern Mariana Islands
- 670 - area code within the NANP
- phone number - 7 digits
- US to Northern Mariana Islands international dialing format : 1 + 670 + ??? ????
- this country is part of the North American Numbering Plan - NANP, therefore it is not necessary to dial the 011 exit code in front of the number
Phone
Books:
- The CNMI Phone Book - White and Yellow Pages for Northern Marianas