Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8ISM callsign genealogy
Currently held by IACONO, STEPHEN C
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 K8ISM's current licensee, walking backwards.
- SLEEPER, BRIAN JOHgranted 2013-04-09cancelled 2013-11-06
Successor callsigns
Callsigns held now by people who previously held K8ISM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8ISM, oldest first.
- IACONO, STEPHEN C OH1996-12-10 → cancelled 2008-12-11
- SLEEPER, BRIAN J OH2023-10-26 active