Northern Mariana Islands Calling Code: +1
Complete guide to calling Northern Mariana Islands — international dialing code, step-by-step instructions, and FAQ.
How to Call Northern Mariana Islands from Abroad
📞 Step-by-Step Dialing Guide
- Dial your country's exit code (e.g. 011 from US, 00 from most countries, + from mobile)
- Dial +1 — the country calling code for Northern Mariana Islands
- Dial the local phone number (area code + subscriber number)
About Northern Mariana Islands Calling Code
Northern Mariana Islands's international dialing code is +1. This code is assigned by the International Telecommunication Union (ITU) and must be dialed before the local phone number when calling Northern Mariana Islands from another country. Northern Mariana Islands is located in Oceania.
Northern Mariana Islands is known locally as Commonwealth of the Northern Mariana Islands — Saipan is the capital. When saving an international contact, write the number in full international format with +1 so it works from any country.
Country calling codes (also known as ISD codes or dialing codes) are telephone numbering plan prefixes defined by ITU-T standards E.123 and E.164. Each country is assigned one or more unique prefixes to facilitate international direct dialing.
Where the +1 Calling Code Is Used
The country code +1 is assigned to Northern Mariana Islands, located in Micronesia, with the capital Saipan. This code is part of the international telephony numbering plan and is used for all calls made to Northern Mariana Islands from outside the country.
When you see a phone number written as +1 ..., the +1 prefix tells your telephone network to route the call to Northern Mariana Islands's national telephone network. After the country code, you dial the local area code (dropping any leading 0) and the subscriber number. The same format applies whether you are calling a landline or a mobile phone.
Country codes are allocated by the International Telecommunication Union (ITU-T Recommendation E.164) and are grouped by geographic region. Calling codes starting with 1 are generally assigned to the region around Northern Mariana Islands, in Micronesia. When a phone number is stored internationally, the leading zeros of the domestic area code are omitted after the country code — this is why you will often see numbers written as +1 followed directly by the area code and number.
The country code +1 is shared with United States, Canada, American Samoa, Anguilla, Antigua and Barbuda, Bahamas, Barbados, Bermuda, Cayman Islands, Dominica, Dominican Republic, Grenada, Guam, Jamaica, Montserrat, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Sint Maarten, Trinidad and Tobago, Turks and Caicos Islands, US Virgin Islands, British Virgin Islands. After dialing +1, the following digits (area code + subscriber number) route the call to the correct country, so you must always include the full national number.
Northern Mariana Islands Phone Number Formats
Phone numbers in Northern Mariana Islands follow the ITU E.164 international format: country code + area code + subscriber number. Below is the general structure used for both landlines and mobile numbers.
📱 Number Structure
- International format: +1 [area code] [subscriber number]
- From abroad: exit code + +1 + local number (drop the trunk prefix 0)
- Within Northern Mariana Islands: dial the local number directly
Most countries use a closed or open telephone numbering plan. In an open plan, the length of local numbers varies and the trunk prefix (usually 0) is dropped when dialing internationally. In a closed plan, all national numbers have a fixed length regardless of area. When dialing Northern Mariana Islands from abroad, always replace the leading trunk zero with the country code +1.
Time Zone in Northern Mariana Islands
Northern Mariana Islands is in the Pacific/Saipan time zone, which is UTC+10:00 relative to Coordinated Universal Time (UTC). If you are calling from a different time zone, remember to account for the time difference when scheduling your international call.
When planning a call to Northern Mariana Islands, the time difference matters: a good time to reach businesses in Saipan, the capital, during their working hours may be early morning or late evening in your own time zone. Many international callers use the UTC offset as a quick reference to avoid calling in the middle of the night.
Some countries observe daylight saving time (DST), which shifts the local clock by one hour during summer months. If Northern Mariana Islands uses DST, the effective offset changes twice a year — check the current UTC offset before dialing if your call is time-sensitive. For most purposes, however, the standard offset shown above is sufficient.
Emergency Numbers in Northern Mariana Islands
If you need urgent help while in Northern Mariana Islands, dial the local emergency numbers below. Note that these numbers are only for use inside Northern Mariana Islands.
| Service | Number |
|---|---|
| Police | 911 |
| Fire | 911 |
| Ambulance | 911 |
Example: Calling Northern Mariana Islands Numbers in Practice
Here is how a typical call to Northern Mariana Islands works, depending on where you are calling from:
🌍 From the United States or Canada
- Dial the US/Canada exit code 011
- Dial the Northern Mariana Islands country code +1
- Dial the local number (area code + subscriber number, without the trunk prefix 0)
Example: 011 +1 [area code] [number]
🌍 From the United Kingdom or Europe
- Dial the international access code 00 (or use the + symbol on mobile)
- Dial the Northern Mariana Islands country code +1
- Dial the local number
Example: 00 +1 [area code] [number], or +1 [area code] [number] from any mobile phone
If the number you are calling has a domestic trunk prefix (often 0) in front of the area code, omit it when dialing from abroad. The country code +1 replaces the trunk prefix entirely.
Calling Northern Mariana Islands from Major Countries
International exit codes differ by country. Use this reference when dialing Northern Mariana Islands (+1) from abroad:
| Calling From | Exit Code | Full International Dialing |
|---|---|---|
| United States | 011 | 011 1 [local number] |
| United Kingdom | 00 | 00 1 [local number] |
| Australia | 0011 | 0011 1 [local number] |
| China | 00 | 00 1 [local number] |
| Japan | 010 | 010 1 [local number] |
| India | 00 | 00 1 [local number] |
| Germany | 00 | 00 1 [local number] |
| France | 00 | 00 1 [local number] |
On mobile phones, the + symbol replaces the exit code entirely — just dial +1 followed by the local number.
Frequently Asked Questions
What is the calling code for Northern Mariana Islands?
The international calling code for Northern Mariana Islands is +1.
How do I call Northern Mariana Islands from the United States?
Dial 011 (US exit code), then +1, then the local phone number.
How do I call Northern Mariana Islands from the United Kingdom?
Dial 00 (UK exit code), then +1, then the local phone number.
Can I use the + symbol instead of the exit code?
Yes! On mobile phones you can dial +1 directly followed by the local number. The + symbol automatically replaces your country's exit code.
How do I call within Northern Mariana Islands?
If you're already in Northern Mariana Islands, simply dial the local number directly. You do not need to use the country code +1 for domestic calls.
What is the capital of Northern Mariana Islands?
The capital of Northern Mariana Islands is Saipan. When calling the capital from abroad, dial +1 followed by the local area code (without the leading 0) and the number.
What are the emergency numbers in Northern Mariana Islands?
Police: 911, Fire: 911, Ambulance: 911. These numbers are only valid inside Northern Mariana Islands.
Other Countries in Oceania
Nearby countries and their calling codes:
Calling Northern Mariana Islands from American Samoa or Guam works the same way: dial your local exit code first, then +1, then the local number. Within Oceania, many callers simply use the + symbol on mobile to avoid exit-code differences.