Southern Laos
(Boloven Plateau), Vietnam (central and southern Annam) and adjacent Cambodia
(Phumi Dak Dam). Considered by some authors to be a subspecies of Black-throated Tit (Aegithalos concinnus).
 
Subspecies
No subspecies.
Considered by some authors to be a subspecies of Black-throated Tit (Aegithalos concinnus).