OBN Views 11 meanings found OBN commonly denotes regulatory bodies such as the Ohio Board of Nursing or Oklahoma Bureau of Narcotics, as well as an open broadcast network and alumni networking groups. Medical Ohio Board of Nursing Miscellaneous Order for Blogging Niftly Obsequious Brown Noser Osman Bashir Nyei Community Old Boys Network Governmental Oklahoma Bureau of Narcotics Oklahoma Bureau Narcotics Regional Connel, Oban, Scotland Computing Open Broadcast Network Business Oil Buying Network Sports Ohio Balloon Network