Based on the global analysis of all available and reliable data for isotopic species 14 Nm O(m＝ 16,17,18), the 14N16 Orovibrational spectral lines are calculated with very high accuracy and completely agree with previous results. Theselines with relative intensities can be achieved as an infrared frequency standard in the spectral range 1600-5600cm-1.The calculated rovibrational transitions of 14NmO(m＝17,18) have the same accuracy as that for 14N16O although theirdata are rare due to their small natural abundance.