Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1TWA callsign genealogy
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 K1TWA's current licensee, walking backwards.
- Handermann, James AOHgranted 2023-07-26cancelled 2023-11-10
Successor callsigns
Callsigns held now by people who previously held K1TWA.
- Waeschle, Clifford RCAgranted 2019-05-07
All historical holders
Every license row we've seen with the callsign K1TWA, oldest first.
- Handermann, James A OH2023-11-10 active
- —— → cancelled 1999-07-27