Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1MER callsign genealogy
Currently held by RONDYKE, MARK E
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 W1MER's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W1MER.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MER, oldest first.
- RONDYKE, MARK E ME2013-01-30 → cancelled 2025-01-31
- WIMMER, CHRIS CA2025-03-11 active