Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4DSB callsign genealogy
Currently held by Baer, David S
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 N4DSB's current licensee, walking backwards.
- Baer, DavidFLgranted 2016-01-19cancelled 2016-02-06
Successor callsigns
Callsigns held now by people who previously held N4DSB.
- BOURDEAU, ROBERT HFLgranted 2002-03-07cancelled 2014-03-08
All historical holders
Every license row we've seen with the callsign N4DSB, oldest first.
- BOURDEAU, ROBERT H FL1991-06-11 → cancelled 2002-03-07
- Baer, David S FL2025-12-13 active