Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AJ4EC callsign genealogy
Currently held by Mao, James 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 AJ4EC's current licensee, walking backwards.
- Gomez, Jorge LFLgranted 2012-01-30cancelled 2020-05-08
Successor callsigns
Callsigns held now by people who previously held AJ4EC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AJ4EC, oldest first.
- Mao, James J FL2007-12-20 → cancelled 2019-12-21
- Gomez, Jorge L FL2020-05-08 active