Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ5F callsign genealogy
Currently held by SMITH, CALVIN 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 KJ5F's current licensee, walking backwards.
- SMITH, CALVIN TTXgranted 2006-01-31cancelled 2015-09-15
Successor callsigns
Callsigns held now by people who previously held KJ5F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ5F, oldest first.
- SMITH, WILLIAM T TX2005-03-28 → cancelled 2015-04-01
- SMITH, CALVIN T TX2025-08-16 active