Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4IC callsign genealogy
Currently held by Berlin, Andrew M
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 AB4IC's current licensee, walking backwards.
- Berlin, Andrew MSCgranted 2019-12-18cancelled 2020-06-23
Successor callsigns
Callsigns held now by people who previously held AB4IC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4IC, oldest first.
- NYCUM, WILLIAM G FL2007-12-08 → cancelled 2019-12-24
- Berlin, Andrew M SC2020-06-23 active