It is named for the type of mail delivery used years ago to rural areas. RFD stands for "rural free delivery". I think their offices are in Carollton, Texas. It is carried by DISH satellite. I do not think Direct satellite or cable carries though. They have a website: http://www.rfd-tv.com .
It is one of the reasons I chose DISH over Direct.
I take that back! I just checked and Direct now carries RFD. At the time we put in DISH it was only on DISH. It looks like from the website that some cable companies also carry it. The one we have here does not.