Nick Jr. (also known by its full title Nick Jr. Channel) is an American pay television channel that is run by the Nickelodeon Group, a unit of the Viacom Media Networks division of Viacom, the channel's ultimate owner headquartered in New York City. The channel, which is aimed at children under six years, features a mix of originally-produced programming, and series previously and concurrently aired on the Nick Jr. block and its previous iterations. Some of Nick Jr.'s programming includes series such as Sunny Day, PAW Patrol, Bubble Guppies, Blaze and the Monster Machines, Shimmer and Shine, and Dora and Friends: Into the City!. Due to the Nickelodeon block, Nick Jr. is sometimes disclaimed on air as "the Nick Jr. channel" to avert confusion, especially at times of day where both Nickelodeon and Nick Jr. are both carrying preschool programming.
The channel was originally known as Noggin from its February 2, 1999 launch until September 28, 2009. Sister channel The N was relaunched as TeenNick at the same time and date as Noggin's relaunch as Nick Jr. As with TeenNick, Nick Jr.'s name was taken from a former program block on parent channel Nickelodeon, which aired weekday mornings from 1988 to 2009 under the Nick Jr. name, and still survives today on Nickelodeon as a block with the same name as of 2014 (which currently airs weekdays from 8:00 a.m. to 3:00 p.m. ET/PT and 8:00 a.m. to 1:00 p.m. ET/PT during the summer months or on designated school break periods and major national holidays), having traditional commercial breaks and no common continuity between each series. As of January 2016, Nick Jr. is available to approximately 73.0 million pay television households in the United States.