CN2 may refer to:
CN2 algorithm for rule induction cn2, a weather, sports and political news cable channel owned by Time Warner Cable in former Insight Communications territories Optic nerve (CN2), second cranial nerve Cartoon Network Too, a defunct British channel owned by The WB. ChinaNet Next Carrying Network, one type of the Internet routes provided by China Telecom Cyanonitrene, molecular formula CN2 Cyanogen, molecular formula (CN)2