Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB3UP callsign genealogy
Currently held by Lingenfelter Jr, David P
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 AB3UP's current licensee, walking backwards.
- Lingenfelter Jr, David PPAgranted 2012-12-28cancelled 2014-05-21
Successor callsigns
Callsigns held now by people who previously held AB3UP.
- Lingenfelter Jr, David PAZgranted 2025-06-03