Country code · Oceania
Northern Mariana Islands country code: +1
How to write Northern Mariana Islands phone numbers for your CRM, dialer or SMS tool, and what TrueSearch does with them.
| Country or territory | Northern Mariana Islands |
| Calling code | +1 |
| ISO 3166 code | MP |
| Area codes | 670 |
| Region | Oceania |
| E.164 format | +1670NXXXXXX |
+1 is shared with United States, Canada, Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, Bahamas, Barbados, Anguilla, Antigua and Barbuda, British Virgin Islands, Cayman Islands, Bermuda, Grenada, Turks and Caicos Islands, Jamaica, Montserrat, Sint Maarten, Saint Lucia, Dominica, Saint Vincent and the Grenadines, Dominican Republic, Trinidad and Tobago, Saint Kitts and Nevis.
Checking Northern Mariana Islands numbers with TrueSearch
Northern Mariana Islands is part of the North American Numbering Plan, so TrueSearch reads its numbers like US and Canadian numbers: 10 digits, or 11 starting with 1, with or without the +. Each number gets the live check for valid or dead, line type and carrier.
Northern Mariana Islands is a U.S. territory, so its numbers (area code 670) look and dial like any US number.
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Questions
What is the country code for Northern Mariana Islands?
+1, with area code 670. The same calling code is also used by United States, Canada, Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, Bahamas, Barbados, Anguilla, Antigua and Barbuda, British Virgin Islands, Cayman Islands, Bermuda, Grenada, Turks and Caicos Islands, Jamaica, Montserrat, Sint Maarten, Saint Lucia, Dominica, Saint Vincent and the Grenadines, Dominican Republic, Trinidad and Tobago, Saint Kitts and Nevis.
How do I format a Northern Mariana Islands number in E.164?
Write + then 1, the 3-digit area code and the 7-digit number, with no spaces or dashes: +1670NXXXXXX.
Can TrueSearch check Northern Mariana Islands numbers?
Northern Mariana Islands is part of the North American Numbering Plan, so TrueSearch reads its numbers like US and Canadian numbers: 10 digits, or 11 starting with 1, with or without the +. Each number gets the live check for valid or dead, line type and carrier.
Is every result marked keep?
No. TrueSearch marks a number keep only when it is valid and a mobile line. Landline, VoIP, toll-free and dead numbers are flagged with the reason.
Does TrueSearch check Do Not Call lists?
No. TrueSearch does not check the US National Do Not Call Registry, state DNC lists, litigator lists or any country's do-not-call register.
More Oceania calling codes
Free tool: convert a list of numbers to E.164
Calling codes: ITU-T E.164 country code assignments. This guide is general information, not legal advice. TrueSearch for Business checks validity, line type and carrier from licensed telecom data. It does not check the National Do Not Call Registry, state DNC lists or the FCC Reassigned Numbers Database. Not a consumer reporting agency; not for FCRA purposes.