Northern Mariana Islands phone number format

How do you format a Northern Mariana Islands phone number?

Write a Northern Mariana Islands phone number with the country code +1. A mobile looks like (670) 234-5678 inside the Northern Mariana Islands and +1 670 234 5678 from abroad. Mobiles have 10 digits after the country code, and the E.164 form is +16702345678. Format alone never shows a line is in service.

Northern Mariana Islands number format at a glance

Example Northern Mariana Islands phone numbers

These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.

How to write a Northern Mariana Islands number in E.164

1. Remove spaces, dashes, dots and brackets so only digits are left.
2. The Northern Mariana Islands has no trunk prefix, so keep every digit of the national number.
3. Put +1 in front. The result has 10 digits after the country code for a mobile.

So (670) 234-5678 becomes +16702345678. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.

Mobile or landline?

In Google’s numbering-plan data, many Northern Mariana Islands ranges are listed as “fixed line or mobile”, so the digits alone can’t always say whether a number takes texts. A live carrier lookup asks the network which kind of line serves the number now. More in mobile vs landline lookup.

Mobile, landline and special number ranges in Northern Mariana Islands

Google's data lists no separate mobile range for Northern Mariana Islands, so mobiles and landlines share the same digits. Every valid number of each type below starts with one of the digit groups shown. A number that starts the right way can still be unassigned: the groups say what a range is for, not that a number is connected.

More on Northern Mariana Islands’s free-to-call and charged ranges: toll-free and premium numbers in the Northern Mariana Islands.

Validate a list of Northern Mariana Islands numbers

Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Pro + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.

Common questions

What is the country code for the Northern Mariana Islands?

The country calling code for the Northern Mariana Islands is +1. It is shared with 24 other countries and territories, so the number after it decides which one a number belongs to. When you call the Northern Mariana Islands from abroad, dial your international prefix (or +) followed by 1 and the number.

How many digits is a Northern Mariana Islands phone number?

A Northern Mariana Islands mobile number has 10 digits after the country code +1, the same as a landline.

How do I write a Northern Mariana Islands number in international format?

Start with +1, then add the rest of the number. The mobile number (670) 234-5678 becomes +1 670 234 5678, or +16702345678 in E.164, the form most CRMs and SMS tools expect.

Can you tell if a Northern Mariana Islands number is a mobile?

Not always from the digits. In Google's numbering-plan data many Northern Mariana Islands ranges are listed as "fixed line or mobile", so the number alone doesn't settle it. A live carrier lookup asks the network which kind of line serves the number today.

Does a valid format mean a Northern Mariana Islands number is in service?

No. A valid format means the digits fit a range Northern Mariana Islands's numbering plan allocates. It cannot tell whether the number is connected today or who carries it, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that does not prove someone answers.

Can I check a list of Northern Mariana Islands numbers for free?

Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: E.164, country, format status and numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).