Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9AYH callsign genealogy
Currently held by ROBINSON, HAMLINE W
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 W9AYH's current licensee, walking backwards.
- BISCHKE, ROBERT FWIgranted 1995-11-08cancelled 2001-09-25
Successor callsigns
Callsigns held now by people who previously held W9AYH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9AYH, oldest first.
- ROBINSON, HAMLINE W IN1988-02-16 → cancelled 2000-02-17
- Bischke, Robert F AZ2021-09-13 active