The website for WDAM in southern Mississippi uses this logo on the bottom of the page (the NBC logo is absent in the header):
(wdam.com)
That bears an uncanny similarity to what KWWL used earlier this century, but currently does not:
(northpine.com)
Hmmm.
KWWL’s earlier logo placed the numeral inside a solid circle with the left and bottom extending to the edge.
Wikipedia has an article on a different “Circle 7” logo used at multiple TV stations.