Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA4CL callsign genealogy
Currently held by WALKER, HAROLD L
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 AA4CL's current licensee, walking backwards.
- KN4UBZcancelledClay County Amateur Radio Emergency ServicesALgranted 2019-04-23cancelled 2019-07-16
Successor callsigns
Callsigns held now by people who previously held AA4CL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA4CL, oldest first.
- WALKER, HAROLD L KY2004-02-20 → cancelled 2016-05-18
- Clay County Amateur Radio Emergency Services AL2019-07-16 active