Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4SS callsign genealogy
Currently held by FOELKER, VISCOUNT 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 AB4SS's current licensee, walking backwards.
- Heng, Jeremy Wen MingORgranted 2025-12-20cancelled 2026-01-09
Successor callsigns
Callsigns held now by people who previously held AB4SS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4SS, oldest first.
- FOELKER, VISCOUNT F FL1999-02-10 → cancelled 2011-02-11
- Heng, Jeremy Wen Ming OR2026-01-09 active