Wikipedia
WNFM-TV
"WNFM" was the MyNetworkTV-affiliated cable channel for Southwest Florida using a fictional call sign. It was broadcast exclusively on Comcast channel 8 (hence the My TV 8 branding) and was operated from the Comcast's Southwest Florida headquarters south of Naples Manor on Tower Road along SR 951/ Collier Boulevard. WNFM and WAMY-TV in Huntsville, Alabama are the only MyNetworkTV affiliates that have fictional call letters. It was also the largest cable-only MyNetworkTV affiliate.