It is distributed through cable in Southern Ontario and direct broadcast satellite nationally.and launched on March 30, 1998 as Cable Pulse 24, under the ownership of CHUM Limited and minority partner Sun Media, owner of the Toronto Sun daily newspaper.It is not carried on any analogue cable system outside of Central or Southern Ontario, although it is available on direct broadcast satellite and IPTV television providers in some markets.The channel is available across Canada on Bell TV, on which the station is part of the service's "News" package.Cable Pulse 24 (CP24) is a Canadian English language Category A specialty cable and satellite television channel that is owned by the Bell Media subsidiary of BCE, Inc.Based in Toronto, the channel focuses on local news from the Greater Toronto Area and Southern Ontario, and also covers national and international news.Select programming from other CHUM stations would also be featured on the channel including The New Music and Fashion Television.On December 1, 2004, CHUM Limited acquired the remaining interest in CP24 (giving it 100% of its shares), when the Sun's owners sold their 29.9% share in CP24 after acquiring its independent broadcast station CKXT-TV, the same day that CHUM Limited took control of Craig Media and its assets also.

On September 10, 2010, BCE (a minority shareholder in CTVglobemedia) announced that it planned to acquire 100% interest in CTVglobemedia for a total debt and equity transaction cost of .2 billion CAD.

The deal was finalized later that year, with a stipulation that CTV maintain ownership of CHUM's 299 Queen Street West headquarters and studios.

CTV chose to keep CP24, and the rest of CHUM assets (including the A-Channel stations) it had said it would sell.

As a result of the ownership changes, CP24 began to separate its operations from those of CITY-TV.

This process began in 2008, with the introduction of new CP24-only personalities (which meant they were no longer seen anchoring/reporting on the City News side), new live eye trucks (also known as Breaking News Vehicles) which were outfitted with white and black design bearing the CP24 and red "Breaking News" decals, the establishment of a new studio and newsroom on the second floor of the 299 Queen Street West building in November of that year, and the removal of nearly all Citytv's news simulcasts from its schedule few weeks later on December 10 of that year, (excluding Breakfast Television), and replacing the 6 p.m.