Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC0JNN callsign genealogy
Currently held by Puhr, Mark 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 KC0JNN's current licensee, walking backwards.
- Puhr, Mark JCOgranted 1999-06-10cancelled 2001-01-17
Successor callsigns
Callsigns held now by people who previously held KC0JNN.
- Puhr, Mark JSDgranted 2019-03-19