Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN6ATO callsign genealogy
Currently held by Chapman, Timothy P
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 KN6ATO's current licensee, walking backwards.
- Aguinaldo, Marcial DCAgranted 2021-08-25cancelled 2021-09-14
Successor callsigns
Callsigns held now by people who previously held KN6ATO.
- Chapman, Timothy PCAgranted 2019-04-13
All historical holders
Every license row we've seen with the callsign KN6ATO, oldest first.
- Chapman, Timothy P CA2019-03-26 → cancelled 2019-04-13
- Aguinaldo, Marcial D CA2021-09-14 active