Time Warner Cable is adding three hig-definition channels to its programming line.

Now available are National Geographic, HGTV and Food Network HD.

The National Geographic channel can be found in Raleigh at 279 and in Wilmington at channel 968.

HGTV is available in Raleigh at channel 277 and in Wilmington at 966.

Food Network HD is at channel 278 in Raleigh and 967 in Wilmington.

With the expansion, Time Warner now offers 26 HD channels.