+1 is the country code for the Northern Mariana Islands

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Call the Northern Mariana Islands How to dial +1

Calls to the Northern Mariana Islands from $0.12/min

+1 explained

The Northern Mariana Islands country code, 1, is what you dial before a Northern Marianas number when you call from abroad. It is also known as the Northern Marianas dialing code, Northern Marianas calling code, or Northern Marianas phone code. In the Northern Marianas phone number format, +1 comes first, then the area code and the local number.

Country code: +1; The 001 country code is the same number
ISO country codes: MP, MNP; Use the MP country code or the MNP country code on forms and passports. To call the Northern Mariana Islands, dial +1
Used in: Northern Mariana Islands; Also on +1: Antigua and Barbuda, Anguilla, American Samoa, Barbados, Bermuda, Bahamas, Canada, Dominica, Dominican Republic, Grenada, Guam, Jamaica, St Kitts and Nevis, Cayman Islands, St Lucia, Montserrat, Puerto Rico, Sint Maarten, Turks and Caicos, Trinidad and Tobago, United States, St Vincent, British Virgin Islands, and US Virgin Islands
Exit code: 00; From most countries. Also 011 from United States and Canada, 0011 from Australia, and + from any mobile
Trunk prefix: None; Keep every digit after +1
Number length: 10 digits; After +1
Time now in the Northern Mariana Islands
Northern Marianas mobile number format: (670) 234-5678; From abroad: +1 670 234 5678
Northern Marianas landline number format: (670) 555-0123; From abroad: +1 670 555 0123

Northern Marianas phone number types

The first digits of a Northern Marianas number tell you what kind of number it is: a landline, a mobile, a free number, or one that costs more to call. Here is a sample of each type of Northern Marianas phone number, as dialed inside the Northern Mariana Islands and from abroad.

Type	Inside Northern Marianas	From abroad
Landline or mobileBoth use the same digits, so the number alone does not tell them apart	(670) 234-5678	+1 670 234 5678
Toll-freeStarts with 8, such as 800.	(800) 212-3456	+1 800 212 3456
Personal numberStarts with 5, such as 500.	(500) 234-5678	+1 500 234 5678
Premium rateStarts with 9, such as 900.	(900) 212-3456	+1 900 212 3456

Good to know before you call the Northern Mariana Islands

Sound like a local

“Håfa Adai”

It means hello in Chamorro, one of the Commonwealth's official languages

Area code 670 replaced the international code on 1 July 1997. Both systems worked side by side for one more year, until 1 July 1998.
Wikipedia: Telephone numbers in Northern Mariana Islands
No US mobile carrier runs a network in the islands, so a cell call to the Northern Marianas is not always billed as a domestic US call.
Wikipedia: Telephone numbers in Northern Mariana Islands
Inside the islands, calls use only the seven-digit number. Area code 670 is added only for calls from the rest of the NANP.
Wikipedia: Telephone numbers in Northern Mariana Islands

What it costs to call the Northern Mariana Islands (using Suparelay)

Landline from $0.12/min

Only 31 of 221 countries cost less to call than the Northern Mariana Islands.

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Want to call the Northern Mariana Islands?

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Why a call to the Northern Mariana Islands fails

You call from: 🇦🇺 Australia

You skip the exit code from the US or Canada

The islands share +1 with the US and Canada, so a call from there dials straight to 670 with no exit code. From any other country, dial your own exit code first, then 1 670.

Connects: 0011 1 670 555 0123
Does not connect: 00 1 670 555 0123

You expect the call to bill like a US call

No US mobile carrier runs a network in the islands, so a call from a US mobile plan to +1 670 does not always bill as a domestic call.

Connects: 0011 1 670 555 0123
Does not connect: 0011 1 800 212 3456

Questions about +1

What is the country code for the Northern Mariana Islands?

The Northern Mariana Islands use area code 670 inside the shared +1 code of the North American Numbering Plan.

What is the Northern Mariana Islands dialing code?

The Northern Mariana Islands dialing code, the Northern Mariana Islands phone code, and the Northern Mariana Islands calling code are the same thing: 670, inside the shared +1 plan. It follows the same Northern Mariana Islands phone number format as a US number, with 670 in place of a US area code.

How do I dial the Northern Mariana Islands from abroad?

From the US or Canada, dial 1 670 then the seven-digit number, no exit code needed. From any other country, dial your own exit code first.

Can I text a Northern Marianas number?

Yes. Address it as +1 670 and the seven digits.

How much does it cost to call the Northern Mariana Islands?

The dialer on this page shows the exact price of the number you enter before you call.

Why do Northern Mariana Islands numbers look like US numbers?

They share the same North American Numbering Plan. The islands joined it in 1997, so a Marianas number dials like a US one, with area code 670 instead of a US area code.