Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB3LB callsign genealogy
Currently held by BAUMGARTNER, MARK A
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 AB3LB's current licensee, walking backwards.
- BAUMGARTNER, MARK APAgranted 2002-12-30cancelled 2010-04-23
Successor callsigns
Callsigns held now by people who previously held AB3LB.
No current licensee on record previously held this callsign.