Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GDP callsign genealogy
Currently held by Penn, Gerald D
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 K4GDP's current licensee, walking backwards.
- Penn, Gerald DCAgranted 2014-11-25cancelled 2014-12-13
Successor callsigns
Callsigns held now by people who previously held K4GDP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GDP, oldest first.
- PUGH, GERALD D VA1999-11-10 → cancelled 2011-11-11
- Penn, Gerald D CA2024-11-16 active