title: Get a finite list of IP addresses for my Heroku App?
body: <p>I have client who wants to send a GET request to my Heroku application. They have asked for a list of IP address to whitelist for egress on their firewall.</p>
  
  <p>I realize this could change weekly or more often, but is it possible to get a finite list of IPs my Heroku app could be on?</p>
  
  <p>I saw the following excerpt on a <a href="http://www.mail-archive.com/heroku@googlegroups.com/msg09210.html" rel="noreferrer">Google Groups page for Heroku</a>, but I could not find it corroborated anywhere else or how to see the list of addresses my app uses.</p>
  
  <blockquote>
    <p>Right now your CNAME setup will round-robin between 8 or so IP addresses, and we find</p>
  </blockquote>
  
  <p>If the list of IP addresses is virtually infinite, do you have any other suggestions for receiving the "GET" request through a firewall economically?</p>