I am curious, please let me know if the following is correct and won't mess up the existing setting:
voice service--> spx service-->X_InboundCallRoute-->{(unknown|?):},{(201XXXXXXX):aa},{ph}
A ? operator doesn't belong inside parenthesis as it's not part of DigitMap syntax.
The SIP scanners typically don't show up as anonymous calls or 'unknown', consequently filtering in the InboundCallRoute proved totally ineffective. I got tired of having the phone ring numerous times at night with nobody on the other end and totally eliminated the nuisance with X_AccessList.