Tlacopan ruled the Tepanec towns of the western Basin, including Azcapotzalco and Coyoacán, and towns farther north to the Otomí center of Xilotepec.
The passage describes Tlacopan's control over various Tepanec settlements across a geographical area, including Azcapotzalco and Coyoacán, as well as towns further north in the region of Xilotepec, which was inhabited by the Otomí people.