Northern Mariana Islands +1 670
To call Northern Mariana Islands from abroad, dial your exit code (or +), then 1 670, then the local number without its leading 1. In full: +1 670-234-5678.
The country calling code for Northern Mariana Islands is +1. A number starting +1 or 001 is a call to or from Northern Mariana Islands. From abroad: +1 670-234-5678.
To call Northern Mariana Islands from abroad, dial your exit code (or +), then 1, then the local number without its leading 1. The +1 code identifies the country; the following digits identify the line (landline or mobile).
How to call Northern Mariana Islands from abroad
011 1 670-234-567800 1 670-234-56780011 1 670-234-5678+1 670-234-5678670-234-5678 is a real-format Northern Mariana Islands mobile number (example from the ITU-T numbering plan): replace it with the number you were given, without its leading 1.
Northern Mariana Islands area codes
In Northern Mariana Islands, landlines usually include an area code after +1 (without its leading 1). Mobiles have no area code.
Number format
(670) 234-5678from abroad+1 670-234-5678(670) 234-5678from abroad+1 670-234-5678Landline numbers in Northern Mariana Islands have 10 digits after the country code; mobile numbers have 10 digits and start with 670. The national prefix 1 is only dialled inside the country — drop it after +1.
Calling abroad from Northern Mariana Islands
To call another country from Northern Mariana Islands, dial the exit code 011 (or + on a mobile), then the country code, then the number. From Northern Mariana Islands to the United States, for example: 011 1 201 555 0123.
A Northern Mariana Islands number in international format is written +1 …. The + stands for the exit prefix (00 in much of the world, 011 in North America). Switching to international format, drop the leading 1.
Cheapest ways to call Northern Mariana Islands
With internet on both ends, apps like WhatsApp, Signal or FaceTime call Northern Mariana Islands for free. To reach a number without an app, VoIP services are usually cheaper than your operator’s international rate.
Frequently asked questions
What country has the code +1?
Northern Mariana Islands has the country calling code +1.
How do I call Northern Mariana Islands from the United States?
Dial 011, then 1, then the local number without its leading 1 — for example 011 670-234-5678.
What does +1 mean?
It is the international dialing code for Northern Mariana Islands. The + stands for your exit code (00 in much of the world, 011 in North America).
Is +1 mobile or landline?
The +1 code identifies the country, not the line type; Northern Mariana Islands landlines and mobiles share it.
A country code covers a whole nation; the full number depends on the city and operator.
Mobile networks in Northern Mariana Islands
2 mobile network operators run their own networks in Northern Mariana Islands. Pick the one with the best coverage where you will spend most of your time.
Owned by NTT Docomo
Owned by IT&E Overseas Inc
- 4G/5G frequency bands used in Northern Mariana Islands: LTE, LTE 700. Most recent smartphones cover them; older or regional models may miss some.
Operators, subscriber counts, network codes and switch-off dates: Wikipedia (lists of mobile network operators, mobile network codes, 2G/3G phase-out, mobile number portability), licensed CC BY-SA 4.0. Figures come from each operator or regulator at the date shown.
Free and premium numbers in Northern Mariana Islands
+1 800-212-3456Free from inside Northern Mariana Islands (numbers starting with 8). From abroad these numbers are often unreachable or charged at the international rate.
+1 900-212-3456Surcharged services — ranges starting with 9002–9009. Do not call back an unknown missed call from such a range: the cost is far above a normal call.
Number ranges: ITU-T national numbering plan for Northern Mariana Islands via Google libphonenumber.