Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4JDP callsign genealogy
Currently held by POKROY, MARK 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 KJ4JDP's current licensee, walking backwards.
- Pittman, John DSCgranted 2019-05-29cancelled 2023-11-28
Successor callsigns
Callsigns held now by people who previously held KJ4JDP.
- POKROY, MARK MFLgranted 2023-06-06
All historical holders
Every license row we've seen with the callsign KJ4JDP, oldest first.
- POKROY, MARK M FL2009-01-28 → cancelled 2013-08-23
- Pittman, John D SC2023-11-28 active