This species is known with certainty only from Kohtao Island, Thailand. However, the tradition has become to assign most striped caecilians from mainland Southeast Asia to this name, as mapped. The attributed range of this species is Peninsular and Mainland Thailand, southeastern Myanmar, Lao People's Democratic Republic, Cambodia and Viet Nam. However, this requires further examination, and the taxonomy might be faulty. Specimens from Yunnan in China are attributed here to Ichthyophis bannanicus.