Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KA1ROS callsign genealogy
Currently held by Carmichael, William A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KA1ROS's current licensee, walking backwards.
- Carmichael, William ATNgranted 2013-10-24cancelled 2014-06-24
Successor callsigns
Callsigns held now by people who previously held KA1ROS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1ROS, oldest first.
- BUTLER, DOROTHY A CT1988-11-01 → cancelled 2000-11-02
- Carmichael, William A TN2014-06-24 → cancelled 2026-06-25