It looks like it is part of the Renap.
Here is a the list I found..
24CHIANTLA / Chiantla Huehuetenango17-DEC-07
Registro Nacional de las Personas - RENAP
But the spelling is different from how you spelt it... So I could be wrong! See the link above... I don't know much about the Renap stuff, but I have seen other people refer to it... SO anyone please feel free to jump in~!
Good Luck