Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KE4UPU callsign genealogy
Currently held by PIPER, CHARLES 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 KE4UPU's current licensee, walking backwards.
- PIPER, CHARLES WNCgranted 2011-12-13cancelled 2012-01-04
Successor callsigns
Callsigns held now by people who previously held KE4UPU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE4UPU, oldest first.
- PIPER, CHARLES W FL1995-01-17 → cancelled 2007-01-13
- PIPER, CHARLES W NC2021-10-26 active