Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SLR callsign genealogy
Currently held by Sellers, Mark
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 K4SLR's current licensee, walking backwards.
- Nunnery, Christopher EVAgranted 2021-08-09cancelled 2021-08-28
Successor callsigns
Callsigns held now by people who previously held K4SLR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SLR, oldest first.
- Sellers, Mark TN2009-05-27 → cancelled 2021-05-28
- Nunnery, Christopher E VA2021-08-28 active