The channel lineup for Comcast's Xfinity television service is available at Comcast's website. Near the top of the page, hovering a cursor over the Programming tab brings down a sub-menu that includes the Channel Lineup, which makes it possible to bring up the channel listings.
Lineups for Comcast's Xfinity service vary from 180 to over 180 channels. Because these lineups vary by geographical location, the website prompts users to enter their zip code to check for availability of lineups in their area. Users must subscribe to Comcast's basic service to have other levels of service, which provide additional channels, available to them.