Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9TWW callsign genealogy
Currently held by SANTIAGO, GEORGE F
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 KD9TWW's current licensee, walking backwards.
- Santiago, GeorgeILgranted 2022-02-25cancelled 2023-02-18
Successor callsigns
Callsigns held now by people who previously held KD9TWW.
- Santiago, GeorgeILgranted 2022-02-25cancelled 2023-02-18
All historical holders
Every license row we've seen with the callsign KD9TWW, oldest first.
- SANTIAGO, GEORGE F PR2021-11-23 → cancelled 2022-02-25
- SANTIAGO, GEORGE F PR2023-02-18 active