They have a crapload of active numbers under all their different fake software (scareware) and other useless tech support nonsense
They used to have a half a dozen consecutive numbers in the 877 toll free prefix, but someone called them a few hundred thousand times quite a while ago now (I wonder who that could have been 
) and they’re now all dead
They have since added another new number in the 626 area code on their RealDefense website entity/identity which all the 877 toll free numbers related to
6266050277 RealDefense (US Tech support) RealDefense