Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3SWG callsign genealogy
Currently held by PUTNAM, ROBERT L
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 K3SWG's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K3SWG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3SWG, oldest first.
- PUTNAM, ROBERT L PA2007-05-07 → cancelled 2019-06-25
- Geibel, Scott W MD2024-07-27 active