Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4GRP callsign genealogy
Currently held by Schott, John C
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 K4GRP's current licensee, walking backwards.
- Schott, John COHgranted 2003-07-24cancelled 2010-04-13
Successor callsigns
Callsigns held now by people who previously held K4GRP.
No current licensee on record previously held this callsign.