Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4TT callsign genealogy
Currently held by ALLRED, KEITH J
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 KP4TT's current licensee, walking backwards.
- Rivera, Victor JPRgranted 2019-03-08cancelled 2026-06-19
Successor callsigns
Callsigns held now by people who previously held KP4TT.
- HERNANDEZ, JUAN FPRgranted 2021-12-24cancelled 2024-01-05
All historical holders
Every license row we've seen with the callsign KP4TT, oldest first.
- ALLRED, KEITH J AE2002-03-19 → cancelled 2014-06-10
- HERNANDEZ, JUAN F PR2018-08-04 → cancelled 2021-12-24
- Rivera, Victor J PR2026-06-19 active