Don't Dial That Digit! Twilio Has Your Back

There are certain numbers that you probably don’t want dialed with your Twilio-powered application, such as 911 (taking time away from legitimate emergencies) or 411 (costing you money).  Twilio will return a 21202 error “Phone number is a ‘premium’ number” whenever these numbers are dialed: 911 411 (any x11 service) (XXX)-555-1212 900/976 Not only is this helpful for you, but it will enable you to rest… Read More