For Origin IP ACL, Akamai publishes downloadable IPv4/IPv6 CIDR lists and TechDocs for supported delivery products. Lists apply only to Origin IP ACL and the products that support it - not to every Akamai edge use case.
Autonomous systems (ASNs)
Known ASNs used by Akamai.
AS16625
AS20940
AS20189
AS36183
AS63949
Origin IP ACL - official CIDR downloads
Official feedDeprecated IPv4 blocks and change notifications are on the same TechDocs path as the CIDR downloads.