Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB0TNH callsign genealogy
Currently held by JOHNSTON, JOHN B
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 KB0TNH's current licensee, walking backwards.
- JOHNSTON, JOHN BCOgranted 2020-07-28cancelled 2020-08-25
Successor callsigns
Callsigns held now by people who previously held KB0TNH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB0TNH, oldest first.
- JOHNSTON, JOHN B KS2005-08-23 → cancelled 2017-08-24
- JOHNSTON, JOHN B IA2020-08-25 active