Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1JDC callsign genealogy
Currently held by Christolin, J 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 W1JDC's current licensee, walking backwards.
- Christolin, J DNJgranted 2015-10-05cancelled 2015-11-24
Successor callsigns
Callsigns held now by people who previously held W1JDC.
- CARR, JOHN DMEgranted 2014-01-22cancelled 2026-04-03
All historical holders
Every license row we've seen with the callsign W1JDC, oldest first.
- CARR, JOHN D ME2000-02-18 → cancelled 2004-04-02
- Christolin, J D NJ2015-11-24 active