Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW4TC callsign genealogy
Currently held by Chang, Javier 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 WW4TC's current licensee, walking backwards.
- CARSON, DOUGLAS WSCgranted 2015-06-11cancelled 2017-02-10
Successor callsigns
Callsigns held now by people who previously held WW4TC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WW4TC, oldest first.
- Chang, Javier A SC2004-04-24 → cancelled 2016-04-26
- CARSON, DOUGLAS W SC2017-02-10 active