Call from this number on 7 Jan, didn't answer. Suspected a cold caller or bot.

I've had 10 phone calls in the last 30 mins from
0401 372 246
0402 032 347
0413 596 713
0422 406 817

Called at 6:39pm. Hang-up on 3rd ring.
20 min later, received call from 0402 120 419 which also hang up.

It's 7.54pm and I just received a call from this number asking for a Mr Hill.
Now we are a business and have had our current number for over ten years.
The only reason I answered it was I am finishing off paperwork.
I would say that the data base they are using is ancient.
Still its not the latest we have received nuisance calls; the latest was after 9.00pm.

Have received more than ten phone calls in the last 24 hours from this and other mobile numbers, all of which just hang up after answering. I've been blocking the numbers but they keep coming through. The associated numbers (so far) are:

0402 032 347
0423 003 765
0412 508 933
0402 513 609
0402 120 419
0413 596 713
0401 372 246