Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4UPE callsign genealogy
Currently held by Cool, William S
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 K4UPE's current licensee, walking backwards.
- Cool, William SVAgranted 2013-10-24cancelled 2014-04-04
Successor callsigns
Callsigns held now by people who previously held K4UPE.
No current licensee on record previously held this callsign.