Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA4CK callsign genealogy
Currently held by KEIL, CHARLES A
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 AA4CK's current licensee, walking backwards.
- Arnold, Michael JVAgranted 2022-08-02cancelled 2023-02-28
Successor callsigns
Callsigns held now by people who previously held AA4CK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA4CK, oldest first.
- KEIL, CHARLES A NC1992-06-16 → cancelled 2004-06-17
- Arnold, Michael J VA2023-02-28 active