• MTN Group, a major South Africa-based mobile telephone network operator active in many African and Middle Eastern countries
• Maritime Telecommunications Network, A mobile phone network that operates on sea vessels like cruise liners.
• Martin State Airport, an airport in Baltimore.
• Manitoba Television Network, the former brand name of CHMI-TV, which is now known as Citytv Winnipeg.
• MonTaNa Colors, a Spanish aerosol paint manufacturer.
• MTN, a television station in Griffith, New South Wales, branded as WIN Television.
• Medium Term Note, a debt note.
• Montana Television Network
• MountainWest Sports Network, the first sports network dedicated to a single NCAA conference (the Mountain West Conference).
• Michigan Talk Network, a 24-hour talk radio network serving Michigan radio affiliates.
• Marine Turtle Newsletter.
• An abbreviation for mountain

In other uses:

• MTN refers to Messaging Telephone Number (Number for Messaging devices like Pagers and Mobitex Blackberries)
• MTN can also refer to a Mobile Transaction Network (an enabler of premium services on mobile phones)
• MTN also sometimes refers to the Monotone software system for revision control