Same here. Asked for my information stating it was national grid. Said national grid pays them to call out but she did not know why....no reason for her call.
Missed the call tonight. Called it back and the message stated that it was National Grid and that office was closed through June 23, but I could call back on June 24 for an appointment. Since this is only March, I'm going to go out on a limb and say it wasn't really National Grid.