Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB2UP callsign genealogy
Currently held by Ludewig, John F
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 AB2UP's current licensee, walking backwards.
- Ludewig, John FNYgranted 2005-07-07cancelled 2005-11-10
Successor callsigns
Callsigns held now by people who previously held AB2UP.
No current licensee on record previously held this callsign.