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Exchange Online Protection IP addresses

Exchange 2013

Applies to: Exchange Online Protection

Topic Last Modified: 2014-07-08

The following data center IP addresses are used by Microsoft Exchange Online Protection (EOP).

EOP does not use URLs for root domain routing. You must use the IP addresses listed in this topic.

The EOP hosted filtering service IPv4 data center IP address ranges use Classless Interdomain Routing (CIDR) notation, and are as follows:

The specific IPv4 data center IP address ranges are as follows: = - = - = - = - = - = - = - = -

The specific IPv6 data center IP address ranges are as follows:


The IP address ranges are only used for relay to customer domains. We do not publish our relay list for non-customer mail, and these ranges may change at any time. To ensure that messages to business partners, a smart host, or an on-premises environment in a hybrid mailbox configuration route through the service’s published range of IP addresses, you must configure an Outbound Connector for routing to that business partner or on-premises environment.
The IP addresses in this topic can change over time. For a record of all IP addresses that have been added, changed, or deprecated in the past year, see Change notification for EOP IP addresses.

For information about IP addresses used by Microsoft Office 365, see Office 365 URLs and IP address ranges.

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