ADN 40

XHTVM-TDT (Canal 40), currently known as ADN 40 (Azteca, ) is a Mexico City-based television channel, which first started broadcasting on June 19, 1995 by as a news channel. The channel was owned by CNI () twice from 1995-2002 and 2003-2005, & is currently owned by TV Azteca.
==CNI Canal 40 (first era)==
===1995–1998===
==Azteca Cuarenta (first era)==
===1998–2000===
On July 29, 1998, CNI started partnering with TV Azteca, resulting in the channel being renamed to .
==CNI Canal 40 (second era)==
===2000–2002===
On July 16, 2000, CNI severed ties with TV Azteca to become an independent TV station, starting a six-year conflict known as el Chiquihuitazo.
==Azteca Cuarenta (second era)==
===2002–2003===
On December 27, 2002, TV Azteca was given the XHTVM license; this lasted for less than a month, making it one of the shortest broadcasting periods in Mexican television.
==CNI Canal 40 (third era)==
===2003–2005===
On January 24, 2003, the channel changed hands back to CNI for the second time, and continued broadcasting for 28 months.
===2005–2006===
On May 19, 2005, this logo was shown on HD broadcasts, but remained unofficial due to the channel's shutdown until February 2006; the reason was due to political criticism.
==Proyecto 40==
===2006–2012===
On February 21, 2006, TV Azteca began transmiting the under the name of , turning it into a national network.
===2012–2015===
===2015–2017===
==ADN 40==
===2017–2022===
On March 13, 2017, TV Azteca renamed the channel to adn40, which broadcasts a news format.
===2022–present===
Category:Television channels in Mexico
Category:Television stations in Mexico
Category:TV Azteca affiliates
Category:Mexico City
Category:TV Azteca
Category:Television channels and stations established in 1995
Category:Mexico
Category:1995
Category:1990s