USA Users Now Have a Secondary Datacenter - IP Addresses Below
These are our current updated IPs and these won't be changed. If we have any changes we will keep you posted.US48.39.54.0/23204.141.42.0/23136.143.190.0/23136.143.187.0/24136.143.188.0/2465.154.166.0/248.45.169.0/24US38.40.222.0/23216.52.72.0/23204.141.32.0/23136.143.186.0/24136.143.189.0/24204.141.160.0/24136.143.182.0/23US3 & US4135.84.80.0/22 (PI-IP)Whitelist the whole subnet.If you don't want to whitelist the above subnet and have any specific requirements based on service IPs, I would suggest you to mail Zoho Support Engineers on zorro@zohocorp.com or noc@zohocorp.com.