Who called from 2030063103

just got a call from this number i answerd the call but they jst hung up does any one think i will get charged or does that only happen when you ring them back?

As all of the above no one answers when I took the call tried to ring but number not recognised message came up!

Just received a call from this number, dont ring them back, just a bunch of losers that want to make money doing nothing.

Got two calls both were busy and turned back. NO idea where its coming from but they keep calling sounds like a scam

0203 006 3103
I recieved a call at 17:35 hrs on 28th feb 2009 again no one answered
and they hung up after 4 or 5 secs.I phoned the number back and I got an
answer machine saying "this mailbox is full". sounds like a scam.