Hi there, 

We are developing a series of integrations between Zoho CRM and Zoho Desk with an on-premises system for a customer and they have firewall rules to access their server, so they are requesting the list of IPs addresses for our backend calls, which are in Sigma and Catalyst to whitelist them.

Can we get the Catalyst EU DC and Sigma list of IPs for them?

I have attached the customer information.

Thanks