Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9CIB callsign genealogy
Currently held by CHAPLAN, SIMON V
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 W9CIB's current licensee, walking backwards.
- CIBOROWSKI, DENNIS EILgranted 2009-04-01cancelled 2010-12-31
Successor callsigns
Callsigns held now by people who previously held W9CIB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9CIB, oldest first.
- CHAPLAN, SIMON V WI1996-06-14 → cancelled 2008-06-17
- CIBOROWSKI, DENNIS E FL2020-10-08 active