Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9BLL callsign genealogy
Currently held by chamness, mark
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 K9BLL's current licensee, walking backwards.
- Chamness, MarkINgranted 2016-03-09cancelled 2017-03-28
Successor callsigns
Callsigns held now by people who previously held K9BLL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9BLL, oldest first.
- LEONARD JR, WILLIAM R IN2004-01-27 → cancelled 2016-01-28
- chamness, mark IN2017-03-28 active