Some VoIP providers offer custom incoming call routing based on whitelists or other criteria.
For example, you could port a number to VoIP.ms, and (in their terms) set up a caller ID filtering rule based on phone book entries, with the those entries managed either through the web form or API. If you wanted known callers to reach your mobile phone instead of a VoIP phone, I imagine you could use a call forwarding rule. Unknown callers could be routed to a busy signal, voice mail, a "not in service" message, or handled in a variety of other ways.
For example, you could port a number to VoIP.ms, and (in their terms) set up a caller ID filtering rule based on phone book entries, with the those entries managed either through the web form or API. If you wanted known callers to reach your mobile phone instead of a VoIP phone, I imagine you could use a call forwarding rule. Unknown callers could be routed to a busy signal, voice mail, a "not in service" message, or handled in a variety of other ways.
https://wiki.voip.ms/article/CallerID_Filtering