Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9PYP callsign genealogy
Currently held by Petruschat, Matthias
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 K9PYP's current licensee, walking backwards.
- Petruschat, MatthiasTXgranted 2026-05-16cancelled 2026-08-15
Successor callsigns
Callsigns held now by people who previously held K9PYP.
No current licensee on record previously held this callsign.