Chronology of call letters WDM

• Date: December 22, 1921 (license date; first broadcast was on January 1, 1922)-June 8, 1925
• Frequency:
  • 833 khz (January 1, 1922-June 30, 1923...)
  • 1280 khz (...June 30, 1924...)
• Location:
  • Washington, District of Columbia (December 22, 1921-June 8, 1925)
• Owner of license:
  • Church of the Covenant (December 22, 1921-June 8, 1925)