Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB3HAM callsign genealogy
Currently held by Strobel, Douglas 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 KB3HAM's current licensee, walking backwards.
- ROBBINS, JOSEPHMDgranted 2015-03-26cancelled 2015-04-14
Successor callsigns
Callsigns held now by people who previously held KB3HAM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB3HAM, oldest first.
- Strobel, Douglas D MD2001-09-11 → cancelled 2013-09-12
- ROBBINS, JOSEPH MD2025-01-15 active