What is the maximum and optimal Address Object Group size?

The maximum number of Address Objects within an Address Group is 1000, including the Address Objects from nested Address Groups. For nested groups, not exceeding 150-200 objects per group is recommended, having 5 nested groups of that size as the limit to not exceed the maximum of 1000 entries in the parent group. We recommend keeping Address Groups to a minimal size consisting of sets of Address Objects that are relevant to usage in multiple areas of the configuration, such as Access Rules, App Rules, Routes, etc.

If a larger set of Address Objects is required, instead of creating a new large Address Group containing only Address Objects, we highly recommend grouping existing Address Groups into a parent Address Group.