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OTN may refer to:

  • OTN1, a Canadian television channel
  • Ontario Telemedicine Network, a not-for-profit, Ontario funded telehealth organization
  • Open Transport Network, a specific ring-based telecommunication network architecture
  • Optical Transport Network, a telecommunication network standards framework for optical networks
  • Oracle Technology Network, the official online/offline community for Oracle technical professionals
  • Ed-Air Airport – Oaktown, Indiana, United States ( IATA code: OTN)
  • Our Teen Network, a teen social network website