Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9BMB callsign genealogy
Currently held by Dau, Andrew 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 N9BMB's current licensee, walking backwards.
- Dau, Andrew WILgranted 2015-08-18cancelled 2015-09-15
Successor callsigns
Callsigns held now by people who previously held N9BMB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9BMB, oldest first.
- HARRISON, JAMES R WI1999-10-21 → cancelled 2012-01-18
- Dau, Andrew W IL2025-08-05 active