Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4CRW callsign genealogy
Currently held by Halterman, Jonathan 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 KJ4CRW's current licensee, walking backwards.
- Halterman, Jonathan CTNgranted 2022-07-22cancelled 2022-08-09
Successor callsigns
Callsigns held now by people who previously held KJ4CRW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4CRW, oldest first.
- WOODFORD, ROBERT FL2008-03-14 → cancelled 2020-03-17
- Halterman, Jonathan C TN2022-08-09 active