Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1RZH callsign genealogy
Currently held by SIKORSKI SR, JOHN 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 W1RZH's current licensee, walking backwards.
- Tavares, George PMAgranted 2024-06-27cancelled 2024-07-19
Successor callsigns
Callsigns held now by people who previously held W1RZH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1RZH, oldest first.
- SIKORSKI SR, JOHN J MA2007-02-17 → cancelled 2019-05-08
- Tavares, George P MA2024-07-19 active