Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KE4CRT callsign genealogy
Currently held by TREFFEISEN, CADE R
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 KE4CRT's current licensee, walking backwards.
- TREFFEISEN, CADE RSCgranted 2018-06-05cancelled 2018-06-26
Successor callsigns
Callsigns held now by people who previously held KE4CRT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE4CRT, oldest first.
- KOREVEC, ANDREW M FL1993-06-08 → cancelled 2005-06-09
- TREFFEISEN, CADE R SC2018-06-26 active