Confidence: Medium · Source: FCC ULS · As of 2026-09-15
KA5PAJ callsign genealogy
Currently held by SIMPSON, WILLIAM D
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 KA5PAJ's current licensee, walking backwards.
- RUZICKA, PATTY AOKgranted 2003-10-09cancelled 2010-02-12
Successor callsigns
Callsigns held now by people who previously held KA5PAJ.
- RUZICKA, PATTY ATXgranted 2014-03-01cancelled 2026-03-07
All historical holders
Every license row we've seen with the callsign KA5PAJ, oldest first.
- SIMPSON, WILLIAM D TX1997-04-03 → cancelled 2009-04-04
- RUZICKA, PATTY A OK2010-02-12 → cancelled 2014-03-01