It&#x27;s not using an A record, it&#x27;s using a CNAME:<p><pre><code>  host blog.lacour.me
  blog.lacour.me is an alias for silvrback.herokuapp.com.
  silvrback.herokuapp.com is an alias for us-east-1-a.route.herokuapp.com.
  us-east-1-a.route.herokuapp.com has address 54.83.3.141</code></pre>