RE: Can I filter contacts with phone number on URL?
Hi Efnan,
If you want to open the contact form through URL, you need get the guid of the contact.
Based on the URL contains phone number, you can get some details about the contact, include contact id.

Then you need use the following url to open the contact form:
https://xxx.crm.dynamics.com/main.aspx?appid=APPID&pagetype=entityrecord&etn=contact&id=33b5b3f2-56e2-ec11-bb3d-0022480c5f41