dmor, really? It looks like the blog points to AWS, as does your API?
jdyer@aleph:~ [git:master] <ruby-1.9.2>
» host api.twilio.com
api.twilio.com is an alias for public-vip374d1ca4e.prod.twilio.com.
public-vip374d1ca4e.prod.twilio.com is an alias for ec2-174-129-254-101.compute-1.amazonaws.com.
ec2-174-129-254-101.compute-1.amazonaws.com has address 174.129.254.101
----
jdyer@aleph:~ [git:master] <ruby-1.9.2>
» host www.twilio.com
www.twilio.com is an alias for public-vip29c4ab3d.prod.twilio.com.
public-vip29c4ab3d.prod.twilio.com is an alias for ec2-174-129-253-75.compute-1.amazonaws.com.
ec2-174-129-253-75.compute-1.amazonaws.com has address 174.129.253.75
jdyer@aleph:~ [git:master] <ruby-1.9.2> » host api.twilio.com api.twilio.com is an alias for public-vip374d1ca4e.prod.twilio.com. public-vip374d1ca4e.prod.twilio.com is an alias for ec2-174-129-254-101.compute-1.amazonaws.com. ec2-174-129-254-101.compute-1.amazonaws.com has address 174.129.254.101 ----
jdyer@aleph:~ [git:master] <ruby-1.9.2> » host www.twilio.com www.twilio.com is an alias for public-vip29c4ab3d.prod.twilio.com. public-vip29c4ab3d.prod.twilio.com is an alias for ec2-174-129-253-75.compute-1.amazonaws.com. ec2-174-129-253-75.compute-1.amazonaws.com has address 174.129.253.75