How to call Mayotte from abroad?

The telephone code to call Mayotte from abroad is 00269 followed by the 6-digit number of who you are trying to reach. 

To call a landline from Mayotte, the number will start with 00269 269 XX XX XX.

To call a mobile phone, the number will start as follows 00296 639 XX XX XX

You don't need the international area code will if you are calling from Metropolitan France or other French overseas departments  or territories.