Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD4TTO callsign genealogy
Currently held by BARKER, LARRY E
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 KD4TTO's current licensee, walking backwards.
- Barker, Larry EVAgranted 2012-08-06cancelled 2012-08-24
Successor callsigns
Callsigns held now by people who previously held KD4TTO.
- BARKER, LARRY EVAgranted 2022-07-02
All historical holders
Every license row we've seen with the callsign KD4TTO, oldest first.
- BARKER, LARRY E VA1992-10-13 → cancelled 2004-10-14
- BARKER, LARRY E VA2012-08-24 → cancelled 2016-09-19