XHCDM-TDT is a digital-only television station licensed to Mexico City, transmitting on channel 21 from Cerro del Chiquihuite.
It is one of the newest stations in Mexico City; while the government had worked for years to build a station (which, had it signed on in analog, might have been channel 36, 38 or 42),[3] it received its permit on February 22, 2010, and it signed on in 2012.
It also carries news programs from Deutsche Welle, typical of other state networks.
A subchannel 21.2 was added, with coverage of the Legislative Assembly of the Federal District.
It was retitled "Ciudad TV, Canal de la Asamblea" after a 2016 name change.