Dial Northern Mariana Islands directly through your phone carrier using country code 1-670 — convenient, but international rates can add up fast.
Prepaid calling cards let you reach Northern Mariana Islands at lower rates, though you'll juggle access numbers and PINs each time.
MeraTalk connects you to Northern Mariana Islands over the internet with HD-clear audio, low rates, and no hardware to set up.
No. 670 is the area code for the Northern Mariana Islands, part of the North American Numbering Plan — the same system the US and Canada use. Northern Mariana Islands has no country calling code of its own.
From the US or Canada, dial 1 670 followed by the seven-digit number. There is no 011 and no separate country code. On a mobile, +1 670 works from anywhere.
It is still an international call. Despite the domestic-looking format, most US carriers bill calls to the Northern Mariana Islands at international rates — worth checking your plan before calling back.
The North American Numbering Plan covers the Northern Mariana Islands, so there is no international prefix and no country code to dial. From the US or Canada, dial 1, then 670, then the seven-digit local number — exactly as you would call another US state.
It is still an international call. Despite the domestic-looking format, most US carriers bill calls to the Northern Mariana Islands at international rates — worth checking your plan before you call back.
On a mobile you can replace the exit code with a + sign and dial +1 670 directly, which works from any country without knowing the local exit code.
Full dialing sequence
From the US or Canada you don't need one: Northern Mariana Islands is part of the North American Numbering Plan, so you dial it like a domestic long-distance call starting with 1. From most other countries, dial 00 first.
Immediately follow with Northern Mariana Islands's country code — no spaces or dashes. This routes your call to Northern Mariana Islands's telephone network. On smartphones, replace the exit code with a + sign.
Add the city or regional code for your destination in Northern Mariana Islands. If the local number starts with a 0 (trunk prefix), drop it — the country code replaces it when dialing internationally.
Enter all remaining digits of the local number exactly as written. For mobile numbers, include every digit — no abbreviations. Press call and your carrier does the rest.
A strong, stable internet connection is the foundation of every clear call — use Wi-Fi or solid data whenever you can.
A quality headset sharpens both ends of the conversation, making your calls to Northern Mariana Islands clearer and more comfortable.
Keep the time difference in mind — UTC+10 — so you reach people at a reasonable hour and not in the middle of the night.
The price of calling Northern Mariana Islands swings widely depending on whether you use a carrier, a calling card, or VoIP — and VoIP usually wins.
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