&gt;Verifying a call would involve &#x2F;&#x2F;<p>I&#x27;m not specifically wanting call verification I&#x27;m wanting them to detail origin if they have it (they can use the callerID field to forward that information to me) or to refuse to route calls that are clearly spoofed. If the callerID is 0 then the phone company knows it&#x27;s spoofed and can block it, but they don&#x27;t get paid for that - that&#x27;s the only reason I can come up with for them to forward calls that have certain incorrect origin information. At least when I look at the callerID display and it says my number I know that it&#x27;s not possible that call is anything other than spam - why would a company choose to forward such calls if not for the money they get for doing so?<p>&gt;You can ask the phone company to research the calls made to your number at a specific time, and in the process of reconciling billing &#x2F;&#x2F;<p>Are you telling me that at the point the company decides to carry a call from an external source they don&#x27;t know if they&#x27;re going to be able to bill that company for the call? Surely they know the network origin of the call - they at least know the hard infrastructure it&#x27;s arrived at their periphery from, they have to right?<p>So when I get a foreign call centre spammer on the line the company knows at the very least that was forwarded to them from, let&#x27;s say, France Telcom [made up example] and could give me that info in the callerID field.