Radio testing from Águila attempting comms with Puma on #satcom 266.750 MHz. I think these might be Colombian military units.
Your search for 266.750 returned the following results.
Brief comms w/ Charlie 51 calling Executioner Ops on 251.850 MHz via CONUS. I have logged the same callsign on 266.750 back in 2015.
Tags: CONUS
Spanish language traffic from “Ejército 2106” (Army 2106?) conducting radio checks and test counts.
Suspected accidental comms from Blackhawk 371 calling Range Control.
Tags: CONUS
251.850 CONUS: Outlaw 41 calling Valor 77 on “Sat Echo”
Tags: CONUS
266.750 CONUS: Hellcat 71 calling Valor 41 for comms check.
Tags: CONUS
266.750 CONUS: Bravo 43 calling Valor 77 for UHF satcom radio check.
Tags: CONUS
266.750 CONUS: Loach 632 calling Valor Ops in clear satcom voice.
Tags: CONUS
Probable exercise traffic with Golf 31 passing traffic in satcom clear voice!
Tags: CONUS
Vaquero clg Desert Knight element for radio check via satcom on 266.750.
Tags: CONUS