Northern Mariana Islands Country Code: +1-670

The country code for Northern Mariana Islands is +1-670 (ISO codes MP and MNP). You need it every time you phone Northern Mariana Islands from another country.

To call Northern Mariana Islands in four steps:

1. Dial your international access prefix: 00 in most countries, 011 from the USA and Canada, or simply + on a mobile phone.
2. Dial the Northern Mariana Islands country code: 1-670.
3. Dial the local number. If it starts with a 0 (the national trunk prefix), leave that 0 out; a few countries, such as Italy, keep it.
4. Result: +1-670 followed by the local number, e.g. +1-670 [local number].