Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4TKH callsign genealogy
Currently held by Heard, Thomas K
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 N4TKH's current licensee, walking backwards.
- Heard, Thomas KALgranted 2024-03-14cancelled 2025-01-14
Successor callsigns
Callsigns held now by people who previously held N4TKH.
- MCALISTER, SIDNEY RFLgranted 2021-02-09