Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN9ABC callsign genealogy
Currently held by Herren Sr, William J
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 KN9ABC's current licensee, walking backwards.
- Herren Sr, William JFLgranted 2018-07-23cancelled 2018-08-28
Successor callsigns
Callsigns held now by people who previously held KN9ABC.
- Herren Sr, William JFLgranted 2018-10-05