Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB9JB callsign genealogy
Currently held by Demchak, John J
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 AB9JB's current licensee, walking backwards.
- Demchak, John JINgranted 2004-04-21cancelled 2004-05-14
Successor callsigns
Callsigns held now by people who previously held AB9JB.
No current licensee on record previously held this callsign.