Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4UPT callsign genealogy
Currently held by UPTON, DONALD M
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 W4UPT's current licensee, walking backwards.
- UPTON, DONALD MALgranted 2025-05-30cancelled 2026-09-05
Successor callsigns
Callsigns held now by people who previously held W4UPT.
No current licensee on record previously held this callsign.