Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ESC callsign genealogy
Currently held by GRINDLE, MICHAEL F
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 K7ESC's current licensee, walking backwards.
- Grindle, Michael FIDgranted 2020-09-15cancelled 2020-10-06
Successor callsigns
Callsigns held now by people who previously held K7ESC.
- GRINDLE, MICHAEL FNMgranted 2021-05-28