I answered the call and announced myself, but there was no reply so I hung up immediately.

Did no answer

I answered, but nobody there??

It looks like a strange number so I let it go through to the answering machine. Of course they did not leave a message so I have blocked it

Got the usual background conversation noise - nobody answered - hung up straight away.

did not speak or leave a message

he hung up when i gave him a mouthful!

Rang, answered but no one on line. Suspect auto dialler for a charity, solar sales or electricity company given that is happening several times a day now.