Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC6MAX callsign genealogy
Currently held by SCHREIBER, MAX R
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 KC6MAX's current licensee, walking backwards.
- SCHREIBER, MAX RCAgranted 2004-02-27cancelled 2004-03-19
Successor callsigns
Callsigns held now by people who previously held KC6MAX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC6MAX, oldest first.
- COTELLESSO, HECTOR N CA1990-06-19 → cancelled 2002-06-20
- SCHREIBER, MAX R CA2023-12-23 active