Northern Mariana Islands (+1-670) dialing prefix decoded.
The CNMI's tourism and garment sectors are connected via NANP. Ringflow gives you a local +1-670 DID — active on day one, routing to Saipan.
Everything about calling the CNMI.
The Commonwealth of the Northern Mariana Islands shares the North American Numbering Plan — dial +1-670 then seven digits. Tourism from Japan and South Korea and US military activity drive call demand.
Northern Mariana Islands country information
Three ways to call Northern Mariana Islands right now.
NANP dialing: +1-670 plus seven digits. Ringflow routes via Pacific DID infrastructure for consistent quality to Saipan, Tinian and Rota.
Direct calls using landlines & mobile phones
Dial Northern Mariana Islands directly from any landline or mobile by entering your international exit code, then the country code +1-670, and finally the local number.
International calling cards for Northern Mariana Islands
Pre-paid international calling cards remain a convenient, low-cost way to reach Northern Mariana Islands. Each card gives you a PIN and an access number to place global calls.
VoIP services for contacting Northern Mariana Islands
VoIP apps like Skype, WhatsApp and Viber — and business VoIP from Ringflow — route calls to Northern Mariana Islands over the internet, usually at far lower rates than traditional carriers.
Northern Mariana Islands at a glance.
A US Commonwealth in the Western Pacific with around 50,000 people. Saipan is the largest island and main commercial centre. The CNMI hosts US Air Force and Marine Corps bases.
How to call the Northern Mariana Islands.
Dial +1, then 670, then the seven-digit local number. No separate exit code needed from most VoIP platforms.
Number anatomy
Start with the exit prefix
Press + on a mobile (hold the 0 key), or dial 00 from most countries, or 011 from North America.
Add the Northern Mariana Islands code
Dial +1-670. This identifies Northern Mariana Islands on the global telephone network.
Enter the area or mobile prefix
Type the first part of the local number. Drop the leading 0 if there is one.
Finish with the subscriber number
The remaining digits route the call to the specific line in Saipan or elsewhere.
Dialling Northern Mariana Islands (+1-670) from other countries
The exit prefix changes by origin; the Northern Mariana Islands code stays +1-670.
| Calling from | Exit prefix | You dial, then the national number |
|---|---|---|
| United States & Canada | 1 | 1670 |
| United Kingdom & most of Europe | 00 | 00 1670 |
| Australia | 0011 | 0011 1670 |
| Japan | 010 | 010 1670 |
| Any mobile (E.164) | + | +1-670 |
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FAQ
Calling the Northern Mariana Islands, answered.
What tourism and defense sector contacts ask before dialling the CNMI on +1-670.
Connect to the Northern Mariana Islands on carrier-grade Pacific routes.
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Dialling Northern Mariana Islands without misdialling
Northern Mariana Islands’s calling code is +1-670 , which puts it in the North American Numbering Plan — the United States, Canada and 20-odd Caribbean territories, all sharing +1. The codes below are the ones a caller actually reaches by mistake, so they are worth checking before a number goes into a CRM or an outbound list.
| Dial this by mistake | and you reach | Why it happens |
|---|---|---|
| +1-671 | Guam | One digit out on the last position |
Other Oceania countries in the same numbering zone: American Samoa +1-684, Guam +1-671. Northern Mariana Islands's capital is Saipan.