Confidence: Medium · Source: FCC ULS · As of 2026-09-15
W3GBJ callsign genealogy
Currently held by APPLER, JOHN V
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 W3GBJ's current licensee, walking backwards.
- APPLER, JOHN VMDgranted 2011-07-27cancelled 2014-09-12
Successor callsigns
Callsigns held now by people who previously held W3GBJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3GBJ, oldest first.
- APPLER II, THOMAS V MD2006-05-31 → cancelled 2013-09-29
- APPLER, JOHN V MD2014-09-12 active