Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NB9J callsign genealogy
Currently held by JOSLIN, ROBERT 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 NB9J's current licensee, walking backwards.
- JOSLIN, ROBERT WMDgranted 2007-03-07cancelled 2012-01-27
Successor callsigns
Callsigns held now by people who previously held NB9J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB9J, oldest first.
- BAKER, DONALD J WI1992-09-15 → cancelled 2004-09-16
- JOSLIN, ROBERT W MD2021-11-03 active