Philadelphia – WACP

WACP Channel 4  Over the Air/Antenna

Verizon FiOS channel 4
DirecTV channel 4 (SD and HD)
Dish Network Channel 4 and 860

Comcast/Xfinity Channel 4 (SD) and 789 (HD).  Note *in small pockets/zones SD is Channel 4 or 26 and HD is on 804 instead (check your local listings/guide)
Service Electric Birdsboro channel 16/516
RCN Lehigh PA ch 18 and 611 and RCN Philadelphia channel 2 and 611