Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9TB callsign genealogy
Currently held by Blasco, Thomas 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 KD9TB's current licensee, walking backwards.
- Blasco, Thomas AILgranted 2020-09-14cancelled 2022-03-25
Successor callsigns
Callsigns held now by people who previously held KD9TB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD9TB, oldest first.
- HOLCOMB, CLARISSA H IL1992-05-19 → cancelled 2004-05-20
- Blasco, Thomas A IL2022-03-25 active