 <p>Twilio developer evangelist here.</p> <p>I'm afraid <a href="https://www.twilio.com/docs/api/rest/call#list-get-filters" rel="nofollow">the Calls endpoint only takes one "From" number as a filter</a>, you can't pass a list of numbers to it. You might want to return all calls and then filter manually yourself or alternatively loop through the numbers you want to return calls from and make list calls for each of them.</p>