Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4JJD callsign genealogy
Currently held by ABBOTT, ROBERT C
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 N4JJD's current licensee, walking backwards.
- Doyle, Jonathan JGAgranted 2009-01-20cancelled 2009-10-31
Successor callsigns
Callsigns held now by people who previously held N4JJD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JJD, oldest first.
- ABBOTT, ROBERT C NC1994-07-14 → cancelled 2006-07-15
- Doyle, Jonathan J FL2020-04-15 active