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CRN may refer to:

  • Climate Reference Network a network of climate stations in the United States for future long-term standardized observations
  • Cognos ReportNet, a software sold by Cognos designed to facilitate reporting of databases
  • CRN, SIL code for the Cornish language
  • CRN, station code for Crowthorne railway station in the United Kingdom
  • Cable Radio Network, a distributor of talk radio programming to cable television outlets in the United States
  • Cumann Rince Náisiúnta, an Irish Dancing organisation
  • CRN, Amtrak station code for Creston, Iowa, United States
  • CRN, cosmogenic radionuclides
  • CrN, chromium nitride
  • CRN Magazine, originally titled Computer Reseller News