Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1LEO callsign genealogy
Currently held by ZSCHAU, AARON M
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 KA1LEO's current licensee, walking backwards.
- Zschau, Aaron MMAgranted 2009-04-20cancelled 2009-05-12
Successor callsigns
Callsigns held now by people who previously held KA1LEO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1LEO, oldest first.
- ANDERSON, JOSEPH M NM1990-12-11 → cancelled 2002-12-12
- ZSCHAU, AARON M WA2019-03-05 active