O365 IP space

Chien, Ryan rchien at verisk3e.com
Tue Sep 25 17:24:33 UTC 2018

The IPs have changed a few times since the document’s inception, so I cross referenced the documented O365 IPs with ARIN’s database.  I then chose to implement the CIDR as defined by ARIN  (YMMV).



From: NANOG <nanog-bounces at nanog.org> On Behalf Of Ken Matlock
Sent: Tuesday, September 25, 2018 10:20 AM
To: ml at kenweb.org
Cc: NANOG <nanog at nanog.org>
Subject: Re: O365 IP space

This list?


From the linked-above page (it's somewhat obscured).


On Tue, Sep 25, 2018 at 11:14 AM ML <ml at kenweb.org<mailto:ml at kenweb.org>> wrote:

In the past I've pulled down an XML file that included the IP space for all of the O365 products.  Then I filtered, sorted and aggregated what I wanted for my internal use via a script.

On 9/25/2018 12:35 PM, David Bass wrote:
Sorry, I should have stated that I have already searched, and have seen the above mentioned docs as well as everything else on the first page of the search results.

I guess what I was looking for was to see if somebody has already consolidated that list in to something easier to work with.

On Tue, Sep 25, 2018 at 11:26 AM Job Snijders <job at ntt.net<mailto:job at ntt.net>> wrote:
On Tue, Sep 25, 2018 at 12:18:50PM -0400, Steve Meuse wrote:
> https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-ranges<https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.microsoft.com_en-2Dus_office365_enterprise_urls-2Dand-2Dip-2Daddress-2Dranges&d=DwMFaQ&c=birp9sjcGzT9DCP3EIAtLA&r=sqQMNfenuGWZfvPw2xpRcgpM9ZSFgu41ZF5latIZEjU&m=VBYtuXSPTTxmolNwQc1HbU5bCG3Ra_V7W2-CH99aMTI&s=_KHZHGMNq9Z9mueBRFvlAuEXTlrns3DZ_DXSlPUtRhI&e=>

I think it is cool that companies take the time and effort to publish
such useful lists. Keep it up!

Kind regards,



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