Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1UMP callsign genealogy
Currently held by Wittmann, Iris
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 K1UMP's current licensee, walking backwards.
- Wittmann, IrisCAgranted 2026-07-14cancelled 2026-08-01
Successor callsigns
Callsigns held now by people who previously held K1UMP.
No current licensee on record previously held this callsign.