Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4SG callsign genealogy
Currently held by Mc Murray, 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 K4SG's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4SG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SG, oldest first.
- Mc Murray, William D NC2005-11-29 → cancelled 2015-09-29
- SHORE, BRIAN C NC2017-10-20 active