Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1ST callsign genealogy
Currently held by RITCHIE, FRANCIS J
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 KA1ST's current licensee, walking backwards.
- STIER, STEVEN ACTgranted 2006-11-21cancelled 2016-03-22
Successor callsigns
Callsigns held now by people who previously held KA1ST.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1ST, oldest first.
- RITCHIE, FRANCIS J CT1997-12-22 → cancelled 1999-07-17
- Stier, Steven A CT2026-06-04 active