Chronology of call letters WOI

• Date: April 28, 1922-2013...
• Previous call letters: 9YI
• Frequency:
  • 619 khz (April 28, 1922-May 1, 1922...) [concurrently with 833, see history page]
  • 833 khz (April 28, 1922-June 30, 1924...) [concurrently with 619, see history page]
  • 1110 khz (...March 1925-June 30, 1926...)
  • 1130 khz (...June 30, 1927-June 30, 1928...)
  • 640 kHz (...March 29, 1941...)
• Location:
  • Ames, Iowa (April 28, 1922-2013...)
• Owner of license:
  • Iowa State College (April 28, 1922-June 30, 1928...)