The excerpt below (taken from http://www.rac.ca/2300plan.htm) lists frequencies used by Ham radio and license exempt users.
802.11b (2400-2450MHz / Channels 1-9)
Frequency in MHz
Purpose
2400.00 - 2403.00
SATELLITE
2403.00 - 2408.00
SATELLITE, HIGH RATE DATA
2408.00 - 2410.00
SATELLITE
2410.00 - 2413.00
FM REPEATER OUTPUTS
2413.00 - 2418.00
HIGH RATE DATA
2418.00 - 2430.00
FAST SCAN TELEVISION
2424.00 - 2424.50
JAPANESE EME WINDOW
2424.25
CENTRE OF JAPANESE EME WINDOW
2430.00 - 2433.00
SATELLITE
2433.00 - 2438.00
SATELLITE, HIGH RATE DATA
2438.00 - 2450.00
WBFM, FSTV, SPREAD SPECTRUM, EXPERIMENTAL
