January 31, 1924 U.S. Broadcast Station List
The following list -- U.S. broadcasting stations by callsign as of January 31, 1924 -- appeared on pages 12-20 of the February 1, 1924 (#82) issue of the Commerce Department's Radio Service Bulletin. These scanned pages come from the Federal Communication Commission's Radio Service Bulletins site.
A chart for converting operating wavelengths to kilohertz is located at Kilohertz-to-Meters Conversion Charts.