Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4UPD callsign genealogy
Currently held by BROWN, PAUL H
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 KD4UPD's current licensee, walking backwards.
- BROWN, PAUL HUTgranted 2025-07-31cancelled 2025-08-19
Successor callsigns
Callsigns held now by people who previously held KD4UPD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4UPD, oldest first.
- BROWN, PAUL H UT2012-12-29 → cancelled 2024-12-31
- BROWN, PAUL H UT2025-08-19 active