Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA4J callsign genealogy
Currently held by Crowder, Larry J
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 AA4J's current licensee, walking backwards.
- phillips, Robert EALgranted 2016-07-30cancelled 2019-10-16
Successor callsigns
Callsigns held now by people who previously held AA4J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA4J, oldest first.
- Crowder, Larry J AL2007-08-01 → cancelled 2017-09-25
- phillips, Robert E AL2019-10-16 active