Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1JHK callsign genealogy
Currently held by Knowles, John H
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 W1JHK's current licensee, walking backwards.
- Knowles, John HMAgranted 2025-04-12cancelled 2025-07-18
Successor callsigns
Callsigns held now by people who previously held W1JHK.
No current licensee on record previously held this callsign.