I received a call from this number and the below two, claiming to be from 'Smoke Alarms Australia' contracted by me landlord trying to organise a time to inspect the fire alarm.

(1) 0406 641 800
(2) (02) 8355 3874

I contacted my landlord and they mentioned that the above is false, there is no contract between the two parties, and to ignore and 'block' all calls.

I recommend you all to do the same, as I suspect these people want access inside your property for some reason.

Be careful. Let no one in your property, and if they claim to have permission by the owner/landlord then always be sure to prove this claim.

Confirmed, related to mobile 0406 641 800