Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6JDR callsign genealogy
Currently held by MUHLENBERG, DAVID D 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 W6JDR's current licensee, walking backwards.
- Robertson, James DCAgranted 2010-04-27cancelled 2012-06-05
Successor callsigns
Callsigns held now by people who previously held W6JDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6JDR, oldest first.
- MUHLENBERG, DAVID D K CA1998-01-21 → cancelled 2010-01-22
- Robertson, James D ID2022-12-01 active