If you want to block the with-held numbers coming onto your phone, all you need to do is dial 150 and speak to a Customer Services Advisor to activate a feature we call the Anonymous Caller Rejection[ACR] which blocks all the calls coming from with-held numbers. It takes around 12 hrs to get it activated onto the phone line.
It is chargeable and quite useful as well.
Dev Faults Team I work for Virgin Media but all opinions posted here on the forum are my own…
Give a call on 150 from your virgin landline and we're always here to help you..