Nmap scan report for us1.mailchimp.com (23.45.9.144)
Host is up (0.00037s latency).
rDNS record for 23.45.9.144: a23-45-9-144.deploy.static.akamaitechnologies.com
Not shown: 998 filtered tcp ports (no-response)
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https

Nmap done: 1 IP address (1 host up) scanned in 6.47 seconds