Confidence: Medium · Source: FCC ULS · As of 2026-09-11
K4RAZ callsign genealogy
Currently held by King, Thomas D
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 K4RAZ's current licensee, walking backwards.
- Underwood Jr., Lawrence EALgranted 2021-03-26cancelled 2023-04-14
Successor callsigns
Callsigns held now by people who previously held K4RAZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4RAZ, oldest first.
- King, Thomas D FL2010-04-24 → cancelled 2022-07-15
- Underwood Jr., Lawrence E TN2023-04-14 active