Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1SDR callsign genealogy
Currently held by GAWRON JR, JOHN
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 KA1SDR's current licensee, walking backwards.
- SMITH, STEVEN FMAgranted 2012-06-19cancelled 2013-12-31
Successor callsigns
Callsigns held now by people who previously held KA1SDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1SDR, oldest first.
- GAWRON JR, JOHN CT1988-08-09 → cancelled 2000-08-10
- SMITH sr, STEVEN F MA2023-11-22 active