I forgot about this thread, lol.
Pike's main office is in Mt Airy, NC. You may want to search for something along those lines. As far as the trucks in Salisbury (where I live), and the Charlotte Metro area as a whole, Pike uses Lo Band stuff (as indicated by the antennas on the trucks) as well as Duke Energy's new Open Sky system.
Williams Electric in the Charlotte Metro area as well as other places utilizes Duke's Open Sky system as well. As far as any other stuff I can't say as I've only seen the standard 800 Motorola antennas (when Dukes old Type 1 system was still in service), and they now have the new combo type antenna that has an NMO mount with a GPS "puck" built in. I'm not sure who the manufacturer is. All vehicles using the Open Sky system use this antenna (Duke, Pike, Williams, Asplundh, etc). The GPS part is used for the mapping program used on the MDT's in the trucks.
Hope this helps !!!