Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0JTC callsign genealogy
Currently held by ISENMANN, WILLIAM E
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 W0JTC's current licensee, walking backwards.
- Isenmann, Steven MIAgranted 2009-02-12cancelled 2009-03-03
Successor callsigns
Callsigns held now by people who previously held W0JTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0JTC, oldest first.
- ISENMANN, WILLIAM E IA1995-04-25 → cancelled 2007-04-26
- Isenmann, Steven M UT2018-12-07 active