Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SWM callsign genealogy
Currently held by Mc Cullar, Sammy W
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 K4SWM's current licensee, walking backwards.
- McKinney, Seth WSCgranted 2018-06-08cancelled 2023-09-16
Successor callsigns
Callsigns held now by people who previously held K4SWM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SWM, oldest first.
- Mc Cullar, Sammy W AL2011-04-22 → cancelled 2023-07-12
- McKinney, Seth W SC2023-09-16 active