Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AJ4S callsign genealogy
Currently held by UPTHEGROVE JR, CLARENCE D
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 AJ4S's current licensee, walking backwards.
- Johnson, Daniel TVAgranted 2018-01-16cancelled 2018-12-28
Successor callsigns
Callsigns held now by people who previously held AJ4S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AJ4S, oldest first.
- UPTHEGROVE JR, CLARENCE D GA2007-03-09 → cancelled 2016-12-09
- Johnson, Daniel T VA2018-12-28 active