Calling Mauritius from the United States explained:

• 011 - US exit code; dial first for international calls made from the USA or Canada
• 230 - Country Code for Mauritius
• Phone Number:
  • landlines/VoIP numbers - 7 digits
  • cell phones - 8 digits, initial digit is 5
• sample call from US to a landline in Port Louis: 011 230 ??? ????

How to dial to Mauritius cellular:

• dialing format for calls to a cell phone: 011 230 5??? ????

Phone Books:

• Yellow.mu - Mauritius Yellow Pages

Updates:

• Mauritius telephone numbering changes - September 2013