- Date: March 9, 1922-March 29, 1941...
- Previous call letters: 7XC
- Frequency:
- 619 khz (March 9, 1922-June 1922) [concurrently with 833, see history page]
- 833 khz (March 9, 1922-June 30, 1922...) [concurrently with 619, see history page]
- 1110 khz (...June 30, 1923...)
- 1060 khz (...June 30, 1924-March 1925...)
- 780 khz (...June 30, 1925-June 30, 1926...)
- 860 khz (...June 30, 1927-June 30, 1928...)
- 970 kHz (...March 29, 1941)
- 1000 kHz (March 29, 1941...)
- Location:
- Seattle, Washington (March 9, 1922-March 29, 1941...)
- Owner of license:
- Vincent I. Kraft (March 9, 1922-June 30, 1923...) ( NOTE: Shown as "Northwest Radio Service Co. (Vincent I. Kraft)" in United States Department of Commerce Radio Service Bulletin[1] dated November 1, 1922.)
- Northwest Radio Service Co. (...June 30, 1924-June 30, 1928...) (Note: this does not appear to be a real change in licensee, as Kraft owned Northwest Radio.)