Prefix 0459 290

Caller Type: Unknown

Had this number call and just hang up. Called back straight away and got......’the number you have called is not connected please check the number before calling again.’ This is the second time this evening.Had this issue repeatedly over the past few weeks with different mobile numbers calling and not saying anything & just hanging up. Nuisance. How can a mobile number call you and when you immediately call back the recording claims the number is not connected?....