Laser action on over sixty vibrational‐rotational transitions in the ground electronic state of nitric oxide is obtained by the dissociation of NOCl in a pulsed electrical discharge. The emission occurs between 5.84 and 6.43 &mgr;. The observed frequencies are fitted using the revised vibrational constants &ohgr;e= 1904.01 cm−1and &ohgr;e&khgr;e= 13.995 cm−1.