Questions and discussions about your electricity and gas meters, connections, disconnections and more
AGL should have already sent you your account number, if not you can ring and get that.
Go to your meter box, the meter (or meters) will have the NMI clearly written on them.
I think that must be an OLD NOTICE.
The NMI will be written somewhere, meters like these require removal of pole or similar fuses and will be carried out by your supplier. AGL is a retailer, as it EnergyAustralia
Do you have power at the moment.