Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4JDP callsign genealogy
Currently held by SIMS SR, JAMES K
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 N4JDP's current licensee, walking backwards.
- PETTIT, JOSEPHMNgranted 2024-03-19cancelled 2024-04-06
Successor callsigns
Callsigns held now by people who previously held N4JDP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JDP, oldest first.
- SIMS SR, JAMES K OH2008-03-25 → cancelled 2020-06-19
- PETTIT, JOSEPH D MN2024-04-06 active