Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3JDR callsign genealogy
Currently held by Callahan III, John P
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 K3JDR's current licensee, walking backwards.
- Callahan III, John PPAgranted 2005-09-12cancelled 2011-11-29
Successor callsigns
Callsigns held now by people who previously held K3JDR.
No current licensee on record previously held this callsign.