Hello,
IP addresses to the Akamai are dynamic in nature.
The actual IP addresses on the Akamai network are subject to change at any time and distributing an authoritative list of current Akamai IP addresses is administratively prohibitive.
One of the features of the Akamai network is that even when machines become unavailable, Akamai is able to dynamically map users to the closest available server. So, hard coding the Akamai IP addresses into any system is not recommended.
Hope that helps!!