I got a missed call from this number today and also different but similar numbers in the past week. They never leave a message. So thought to call them back to see who it is from. They literally answered straight away and just said 'hello'! No mention of a business name when they answered my call. She said she is calling from 'Liverpool Sydney regarding sustainable solar by the government. Have you heard about that?' I said no and sound like you're a scammer and please don't call me again. Bye.
Other similar numbers I received missed calls from lately are: (02) 7238 0037 and (02) 7238 0035

Three-second call but no message. Scammers.

Said they were from Telstra and said I have an internet issue. When pressed about it he hung up.

Sounded like a call centre from background noise, they hung up after 3 seconds or so. Assumed telemarketer or scammer. I Blocked this number.