Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB0SFJ callsign genealogy
Currently held by Sullivan, Steven J
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 WB0SFJ's current licensee, walking backwards.
- Sullivan, Steven JIAgranted 2002-01-31cancelled 2011-11-01
Successor callsigns
Callsigns held now by people who previously held WB0SFJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB0SFJ, oldest first.
- SULLIVAN, STEVEN J IA1988-03-22 → cancelled 2000-03-23
- Sullivan, Steven J IA2023-03-22 active