Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4SWH callsign genealogy
Currently held by Firchow, Jon C
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 W4SWH's current licensee, walking backwards.
- Firchow, Jon CGAgranted 2024-06-15cancelled 2024-07-16
Successor callsigns
Callsigns held now by people who previously held W4SWH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SWH, oldest first.
- STEPHENS, LEONARD J GA2004-06-16 → cancelled 2016-08-16
- Firchow, Jon C GA2024-07-16 active