Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NK5K callsign genealogy
Currently held by CLIFFORD JR, JOHN 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 NK5K's current licensee, walking backwards.
- Chapman Jr, Alvin BARgranted 2019-11-15cancelled 2020-08-07
Successor callsigns
Callsigns held now by people who previously held NK5K.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NK5K, oldest first.
- CLIFFORD JR, JOHN J TX2008-04-17 → cancelled 2020-07-17
- Chapman Jr, Alvin B AR2020-08-07 active