Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ0SQA callsign genealogy
Currently held by Krevinghaus, Joseph P
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 KJ0SQA's current licensee, walking backwards.
- Krevinghaus, Joseph PCOgranted 2018-03-20cancelled 2018-04-07
Successor callsigns
Callsigns held now by people who previously held KJ0SQA.
- Krevinghaus, Joseph PCOgranted 2018-05-25cancelled 2019-02-20