Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SUP callsign genealogy
Currently held by Campbell, Alexander 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 N0SUP's current licensee, walking backwards.
- Campbell, Alexander JCOgranted 2017-11-06cancelled 2017-12-02
Successor callsigns
Callsigns held now by people who previously held N0SUP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0SUP, oldest first.
- KRAKLAU, ROBERT J MN2002-05-14 → cancelled 2014-06-03
- Campbell, Alexander J CO2017-12-02 active