Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KE6YYZ callsign genealogy
Currently held by Knowles, Mark 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 KE6YYZ's current licensee, walking backwards.
- Knowles, Mark RORgranted 2021-01-20cancelled 2021-06-07
Successor callsigns
Callsigns held now by people who previously held KE6YYZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KE6YYZ, oldest first.
- Smith, Richard H CA2005-07-20 → cancelled 2017-10-11
- Knowles, Mark R OR2021-06-07 active