came up as "suspected spam" on my mobile so I declined it.
I found this information on "Reverse AU" 35216744
3521 6744 is a Spoofed Caller ID used by scammers who will manipulate the number so that the call appears to be coming from a local or well-known phone number, making it more likely to be trusted or answered.

Caller: Website company?? "(something) initiative"

They said they were from a website company saying they could make our website better.

I answered, they said nothing and disconnected after about 5 seconds, suspect scammer

Telemarketing saying they can reduce my electricity bill

Scam call. Soon as I hear indian accent, I hang up. Fake number.

Caller: Scammer

Scammers again get a proper job

probable scam

I googled the number before picking it up and came up to this page...

Caller: Scammers

Flagged as fraudulent- I Answered silently and it hung up after 3 seconds

I blocked them a while ago which is just as well as they are still ringing.

Suspected scam caller. Did not leave message.

Scammer using fake caller ID

Scammer, Didn't leave msg

spam

ring about 1pm melbourne time... no message left.

Scammers acting as website company mostly they sell your number as Enquiry to companies as lead.

Caller: scammer

Scam Caller

rang at 4pm on a public holiday.

rang back number disconnected

Didn't leave a message - suspect spam.