Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB6HDR callsign genealogy
Currently held by Brennan, James M
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 WB6HDR's current licensee, walking backwards.
- Brennan, James MCAgranted 2012-04-13cancelled 2013-03-01
Successor callsigns
Callsigns held now by people who previously held WB6HDR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB6HDR, oldest first.
- Parlan, Martin CA2000-10-13 → cancelled 2013-01-09
- Brennan, James M CA2023-02-07 active