Oops I reread my statement and I think I miscommunicated. I meant I'm trying to figure out how I might build Twilio (the product). OP's article shows how to sen

Oops I reread my statement and I think I miscommunicated. I meant I'm trying to figure out how I might build Twilio (the product). OP's article shows how to send/receive texts (check). I don't know how Twilio buys numbers, and how I might build a service that buys numbers for people.