Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1KHZ callsign genealogy
Currently held by O'HARA, JOHN T
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 K1KHZ's current licensee, walking backwards.
- White, Robert COHgranted 2025-02-05cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held K1KHZ.
- O'HARA, JOHN TMAgranted 2024-01-03
All historical holders
Every license row we've seen with the callsign K1KHZ, oldest first.
- O'HARA, JOHN T MA2013-11-26 → cancelled 2014-03-29
- White, Robert C OH2025-03-04 active