100.64.0.0/10 CIDR addresses have a 'Success' connection to my Storage account

Simon Magrin 6 Reputation points
2022-02-28T09:32:48.737+00:00

Hi ,

Any idea why these 100.64.0.0/10 CIDR addresses have a 'Success' connection when my Storage account explicitly only allows a single IP?

According to CentralOps, it details this block address as:

*This block is used as Shared Address Space. Traffic from these addresses does not come from IANA. IANA has simply reserved these numbers in its database and does not use or operate them. We are not the source of activity you may see on logs or in e-mail records. Please refer to http://www.iana.org/abuse/

Shared Address Space can only be used in Service Provider networks or on routing equipment that is able to do address translation across router interfaces when addresses are identical on two different interfaces.*

My Storage account only allows a single IP, no VNET's, resource instances nor has it any exceptions from Azure or any network. Any idea why this large address block creates a 'Success' connection and is this address block managed/used by Microsoft Azure?

Thanks

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