- Date: January 1921-2008... ( NOTE: Station shown as a non-commercial licensee in United States Department of Commerce Radio Service Bulletin[1] dated November 1, 1921; call letters appear to have been used without official standing prior to that and official status as a commercial broadcast station not given until January 9, 1922.)
- Previous call letters: 8ZAE
- Frequency:
- 706 kHz (...November 1, 1921...) [concurrently with 1500] ( NOTE: It can be assumed that the change from 706 and 1500 took place on January 9, 1922; all that can definitely be verified is that it had already occurred by the issue of the United States Department of Commerce Radio Service Bulletin[2] dated February 1, 1922.)
- 1500 kHz (...November 1, 1921...) [concurrent with 706] (See Note above)
- 833 kHz (...February 1, 1922-June 30, 1923...) (See Note above)
- 1110 khz (...June 30, 1924...)
- 1090 khz (...March 1925-June 30, 1926...)
- 1110 khz (...June 30, 1927-June 30, 1928...)
- 1380 kHz (...March 29, 1941)
- 1410 kHz (March 29, 1941...)
- Location:
- Pittsburgh, Pennsylvania (January 1921-2008...)
- Owner of license:
- Doubleday-Hill Electric Co. (January 1921-1944) (see also WMU)
- Allegheny Broadcasting Company (1944-December 1957)
- American Broadcasting Company (December 1957-December 16, 1974)
- Taft Broadcasting (December 16, 1974-February 2, 1982)
- Calvary Inc. (February 2, 1982-2008...)