Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB9TYY callsign genealogy
Currently held by HEIEN, JERALD F
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 KB9TYY's current licensee, walking backwards.
- Hauser, JoanCOgranted 2006-11-06cancelled 2013-03-15
Successor callsigns
Callsigns held now by people who previously held KB9TYY.
- K9ATIactiveSON OF NORTHERN ILLINOIS TEN TENILgranted 2018-11-28
All historical holders
Every license row we've seen with the callsign KB9TYY, oldest first.
- Hauser, Joan CO2024-09-17 active
- HEIEN, JERALD F— → cancelled 1999-02-10