Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4TDW callsign genealogy
Currently held by Montesano, Regina 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 KA4TDW's current licensee, walking backwards.
- Montesano, Regina AFLgranted 2018-06-20cancelled 2018-07-10
Successor callsigns
Callsigns held now by people who previously held KA4TDW.
- MONTESANO, FERDINANDO AFLgranted 2020-08-17
All historical holders
Every license row we've seen with the callsign KA4TDW, oldest first.
- MONTESANO, FERDINANDO A FL2004-07-01 → cancelled 2010-11-13
- Montesano, Regina A FL2018-07-10 active