Chronology of call letters WOC

First station

• Date: February 18, 1922-November 11, 1933 ( NOTE: merged with WHO and broadcast as WHO-WOC after May 1933.)
• Frequency:
  • 619 kHz (...March 1, 1922-May 15, 1923) [concurrently with 833 and 750, see history page]
  • 833 khz (...March 1, 1922-October, 1922) [concurrently with 619, see history page]
  • 750 khz (...November 1, 1922-May 15, 1923) [concurrently with 619, see history page]
  • 620 khz (May 15, 1923-June 30, 1926...)
  • 850 khz (...June 30, 1927...)
  • 800 khz (...June 30, 1928...)
• Location:
  • Rock Island, Illinois (...April 1, 1922...)
  • Davenport, Iowa (...June 30, 1922-May 1933) ( NOTE: The actual date of the move from Rock Island to Davenport is doubtful. One listing dated May 15 has two listings for the station, one in each location.)
  • Des Moines, Iowa (May 1933-November 11, 1933)
• Owner of license:
  • Karlowa Radio Company (February 18, 1922-April 1, 1922...) ( NOTE: A history site indicates that Robert Karlowa [presumably, the proprietor of the radio company] sold the station to Col. B. J. Palmer [presumably the proprietor of the chiropractic school] in March 1922. However, a list dated April 1, 1922 gives Karlowa Radio Company as licensee. Yet another list dated May 15, 1922 shows both Palmer School of Chiropractic and Karlowa Radio Co. as owners. Possibly the actual transfer of control occurred between April 1 and June 30, 1922.)
  • Palmer School of Chiropractic (...June 30, 1922-June 30, 1928...)
• Subsequent call letters: (See Note above)

Second station

• Date: November 1934-2013...
• Previous call letters: (See Note above)
• Frequency:
  • 1370 kHz (...March 29, 1941)
  • 1450 kHz (March 29, 1941...)
  • 1420 kHz (...2013...)
• Location:
  • Davenport, Iowa (November 1934-2013...)
• Owner of license:
  • Citicasters Licenses, Inc. (...2013...) (an alias for Clear Channel Communications; see List of stations operated by Clear Channel)