Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4TOM callsign genealogy
Currently held by Endress, Thomas 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 KJ4TOM's current licensee, walking backwards.
- Endress, Thomas FVAgranted 2009-06-17cancelled 2009-07-07
Successor callsigns
Callsigns held now by people who previously held KJ4TOM.
No current licensee on record previously held this callsign.