1957–1963
WHYY-TV was launched (debuted) on September 2, 1957 on UHF channel 35.
1963–1970
In 1963, WHYY-TV changed channels from channel 35 to VHF channel 12.
1970–1972
1972–1974
1974–1978
1978–1981
1981–1984
WHYY-TV PBS 12 welcomes a new partner is WDPB-TV PBS 64 Seaford-Dover, DE-Salisbury, MD-VA it debuted on December 4, 1981.
1984–1986
1986–1997
1997–2000
2000–2019
2019–present
TV stations in the Delaware Valley, including Philadelphia, Northern Delaware, South Jersey and the Lehigh Valley
|
|
Defunct stations
|
