Dang, not very useful
{"mobile_country_code":null,"mobile_network_code":null,"name":null,"type":null,"error_code":60600}
{"mobile_country_code":null,"mobile_network_code":null,"name":null,"type":null,"error_code":60600}
I guess then whether it is 100% on Twilio being the carrier is a little less likely but I tested a few more twilio numbers I know and they all returned with Twilio as carrier.