IDN can refer to:

  • Internationalized domain names, a system for domain names with characters that are not part of ASCII
  • Institut Industriel du Nord, the former name of École Centrale de Lille
  • Indonesia, the ISO 3-letter country code
  • International Data Number, in the context of an X.121 address
  • Identity driven networking, a form of network control
  • Integrated data network, the digital data network developed by Reuters and dedicated to financial markets
  • Integrated Delivery Network, a network of healthcare organizations, see IDS
  • Intradermal nevus, a type of skin mole

See also

  • IDK