Build a carrier block list with Twilio Lookup

sbrijmohan admin
edited September 14 in Inspiration

"Bad actors can target phone verification or two-factor authentication flows to artificially inflate SMS traffic. Certain carriers, knowingly or not, allow this to happen and the fraudsters make money off of this inflated traffic. This could lead to higher than expected Twilio traffic for you.

"Our Verify API for sending one-time passcodes includes comprehensive fraud mitigation mechanisms. However, no provider-side solution can guarantee 100% effectiveness against sophisticated attackers, which is why we encourage customer participation in preventing attacks.

"Fortunately, Twilio's Lookup API can detect carriers and we can use this to filter out known bad actors before sending an SMS verification." Read more about how to build a carrier block list here!

This blog post was written by Twilio's very own @kelley