Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9WHO callsign genealogy
Currently held by JOHNSON, KATHY
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 K9WHO's current licensee, walking backwards.
- Sternberg, Peter VWAgranted 2018-03-26cancelled 2022-11-26
Successor callsigns
Callsigns held now by people who previously held K9WHO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9WHO, oldest first.
- JOHNSON, KATHY CA2010-07-20 → cancelled 2022-07-23
- Sternberg, Peter V WA2022-11-26 active