Those area code numbers always reference the call back number in the voicemail and don’t connect.
These are all toll free numbers I’ve located these voicemails reference such as the area code robocall in the last number from early this morning
8882410041 Tax resolution center/forgiveness advantage approval program
8669181918 Tax resolution center/forgiveness advantage approval program
8666440156 Tax resolution center/forgiveness advantage approval program
8772200211 Tax resolution center/forgiveness advantage approval program
8778674301 Tax resolution center/forgiveness advantage approval program