Television Stations on the Air in June 1948
Here is a list of the television stations on the air in the United States as of June 13th, 1948, either broadcasting regular programming or test patterns, from The New York Times [1].
East
New York:
New York City: WNBT, WCBS, WABD, WPIX
Schenectady: WRGB
Buffalo: WBEN-TV
New Jersey:
Newark: WATV
Connecticut:
New Haven: WNHC-TV
Pennsylvania:
Philadelphia: WPTZ, WFIL-TV, WCAU-TV
Maryland:
Baltimore: WMAR-TV, WBAL-TV
Massachusetts:
Boston: WBZ-TV, WNAC-TV
District of Columbia:
Washington: WTTG, WNBW, WMAL-TVSouth
Virginia:
Richmond: WTVRMidwest
Illinois:
Chicago: WBKB, WGN-TV
Michigan:
Detroit: WWJ-TV
Minnesota:
St. Paul: KSTP-TV
Missouri:
St. Louis: KSD-TV
Ohio:
Cincinnati: WLWT
Cleveland: WEWS
Wisconsin:
Milwaukee: WTMJ-TVWest
California:
Los Angeles: KTLA, KTSL
Utah:
Salt Lake City: KDYL-TV
Works Cited:
1 Poppele, J. R. “Chains Extend Range: Many Additions to the Nation’s Outlets Are in Prospect During 1948.” New York Times. 13 Jun. 1948: XX3.
Related:

June 7th, 2009 at 12:07AM
WJZ [now WABC-TV], the ABC affiliate in New York, didn’t sign on until August 10, 1948. WATV, Channel 13, was a commercial broadcasting station [changing its call letters to WNTA, after being acquired by National Telefilm Associates, in 1958]until it temporarily signed off in December 1961, re-emerging as WNDT {now WNET}, the “educational channel”, in September 1962. DuMont began operating the only TV station in Pittsburgh, WDTV, at the beginning of 1949…and got Admiral to simulcast their “ADMIRAL BROADWAY REVUE” (starring Sid Caesar and Imogene Coca in their first network series together, from January through June) on NBC and DuMont because that was the ONLY way the show could be seen in Pittsburgh.
August 2nd, 2009 at 4:06PM
I am here to tell you that WEWS is still going strong here in Cleveland, but an interesting note is that when it began it was the CBS affiliate here with ABC and Dumont as secondary affiliates…try that now and see what happens