Who called from 203315478

Is this a scam number?
I let it ring out and when I tried to phone back I got a you have dialled a wrong number message

This is a scam number. They are calling and telling that your computer is corrupted and you need to buy an antivirus system. They are saying that it's a call from Microsoft. They nearly rape me for £200! Don't pick up and call back. Total scum!!!