Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9JTK callsign genealogy
Currently held by Kasper, Joel T
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 W9JTK's current licensee, walking backwards.
- Kasper, Joel TWIgranted 2016-07-14cancelled 2016-08-09
Successor callsigns
Callsigns held now by people who previously held W9JTK.
- Kasper, Joel TWIgranted 2017-03-04