Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4NP callsign genealogy
Currently held by ARASWF
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 AB4NP's current licensee, walking backwards.
- KK4NQOcancelledARASWFFLgranted 2013-01-04cancelled 2013-01-25
Successor callsigns
Callsigns held now by people who previously held AB4NP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4NP, oldest first.
- LIBERT, WILLIAM H FL1998-12-15 → cancelled 2010-12-16
- ARASWF FL2023-05-27 active