Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9BK callsign genealogy
Currently held by GRIGG, JAMES 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 W9BK's current licensee, walking backwards.
- Krueger, Robert HILgranted 2005-05-03cancelled 2006-09-08
Successor callsigns
Callsigns held now by people who previously held W9BK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9BK, oldest first.
- GRIGG, JAMES H IL1994-08-16 → cancelled 2006-08-17
- KRUEGER, ROBERT H IL2026-07-29 active