Mailchimp sending IP addresses

If a certain company isn’t receiving your Mailchimp campaigns, then there is a good chance that the company email firewall is blocking emails received from Mailchimp. If this is the case then the email administrator will likely need to whitelist the Mailchimp sending IP addresses. I’ve listed the Mailchimp sending domains and subdomains previously and below are the IP addresses.

Firstly, the Mailchimp delivery IP address ranges are 198.2.128.0 – 198.2.191.255 and 205.201.128.0 – 205.201.143.255 which gives a total of 20,480 IP addresses. Now here is the list of IP addresses.