Those are IPv6 addresses that work a bit differently than IPv4. Most customers only get assigned a single IPv4 address, and even a lot of big data centers only have one or two blocks of 256 addresses. The smallest allocation of IPv6 for a single residential customer is typically a contiguous block of the 18,446,744,073,709,551,616 addresses mentioned.
If Google’s security team is even marginally competent, they will recognize those contiguous blocks and treat them as they would a single IPv4 address. Every address in that block has the same prefix, and it’s actually easier to track on those prefixes than on the entire address.
Those are IPv6 addresses that work a bit differently than IPv4. Most customers only get assigned a single IPv4 address, and even a lot of big data centers only have one or two blocks of 256 addresses. The smallest allocation of IPv6 for a single residential customer is typically a contiguous block of the 18,446,744,073,709,551,616 addresses mentioned.
If Google’s security team is even marginally competent, they will recognize those contiguous blocks and treat them as they would a single IPv4 address. Every address in that block has the same prefix, and it’s actually easier to track on those prefixes than on the entire address.