Because (03) 9122 0910 is not in my contact list the call went straight to voicemail. They did not leave a message
Doing a search on the internet I found this number belongs to Roy Morgan Research.

Caller: Roy Morgan Research

Answered number to try cause chaos with a telemarketer, but when I answered they just hung up straight away. Just blocked and moved on.

No voicemail left. Assume spam

Roy Morgan Research owns and uses this number for research purposes as part of one many market research studies we conduct every day for varied purposes including collecting the views and opinions of the public to inform policy decisions and actions that affect the economy, society, and environment.

We're based at 386 Flinders Lane, Melbourne Australia and have been in business since 1941. Please visit our website at https://www.roymorgan.com/services/who-called-me for more information about this number and what we do. Our privacy policy can be viewed at https://www.roymorgan.com/privacy-policy.

If you wish to speak with our Interviewing Department Manager, please call 1800 337 332.
Best regards,
Carmel King
Roy Morgan Research
www.roymorgan.com
Head Office: Tonic House, 386 Flinders Lane, Melbourne Vic 3000

Caller: Roy Morgan Research

Roy Morgan Research doing a survey. They actually left a message saying who they are and what they're doing.

Caller: Spam

So far I have received phone calls from (03) 9122 0907; (03) 9122 0908; (03) 9122 0909 and (03) 9122 0910. My phone shows all calls originate from Melbourne, Australia. I have not answered these calls as the sequence of numbers (and the fact that I am not expecting any calls from Melbourne) says that these calls are spam. After checking reverseaustralia.com, it would appear that these numbers are indeed spam.

Caller: Unknown

No message left. Assumed spam

Caller: Don't know

Unknown number came up as spam call on my phone. I don't calle back unknown number

they called but did not leave a message. they are now blocked.

Caller: No idea spammers

Call came at 830pm seems like Roy Morgan research no msg or vm left didn't answer anyway, same last night call from 9122 number similar time can't believe they call that late. Blocked number.

Yes I have had multiple calls from this number. I didn't answer, and they left no message.

Call...left no txt or voicemail...Scam???