Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KD4MPI callsign genealogy
Currently held by SLUDER, ROBIN 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 KD4MPI's current licensee, walking backwards.
- Sluder, Robin LOKgranted 2019-07-29cancelled 2019-09-13
Successor callsigns
Callsigns held now by people who previously held KD4MPI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4MPI, oldest first.
- SLUDER, ROBIN L TN1992-04-07 → cancelled 2004-04-08
- Sluder, Robin L OK2019-09-13 active