These people have rung my landline 9 times so far today. Always the same, when the message machine comes on, call centre can be heard in the background and they hang up. Really frustrating but can't block the number because it's a landline.

Caller and did not leave a message. Sounded like a call centre in the background. Nuisance call that was unsolicited. Block if you can.

Calls to my home landline from 0420 132 504. When answer 'phone comes on loud call centre noises in background but doesn't leave a message.