user@host:~$ dig +short  aaaa  www.citi.com
  san.www.citi.com.edgekey.net.
  e16976.x.akamaiedge.net.

  user@host:~$ dig +short  aaaa  www.walmart.com
  www.walmart.com.cdn-wal.net.

You should run the commands yourself, not your end users. Obvio.