Colorado Revised Statutes Title 38. Property Real and Personal § 38-36-147. Tract and alphabetical indexes kept by registrar

The registrar of titles shall keep tract indexes, in which shall be entered the lands registered in the numerical order of the townships, ranges, sections, and, in cases of subdivisions, the blocks and lots therein, and the names of the owners, with a reference to the volume and page of the register of titles in which the lands are registered. He shall also keep alphabetical indexes, in which shall be entered in alphabetical order the names of all registered owners and all other persons interested in or holding charges upon or any interest in the registered land, with a reference to the volume and page of the register of titles in which the land is registered.