O365 IP space

• Subject: O365 IP space
• From: rchien at verisk3e.com (Chien, Ryan)
• Date: Tue, 25 Sep 2018 17:24:33 +0000
• In-reply-to: <CA[email protected]>
• References: <CA[email protected]> <CA[email protected]> <[email protected]> <CAJ7C-OrdoV[email protected]> <[email protected]> <CA[email protected]>

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

https://whois.arin.net/rest/org/MSFT/nets
https://whois.arin.net/rest/org/MSFT-Z/nets

________________________________
Ryan

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?

https://support.content.office.net/en-us/static/O365IPAddresses.xml<https://urldefense.proofpoint.com/v2/url?u=https-3A__support.content.office.net_en-2Dus_static_O365IPAddresses.xml&d=DwMFaQ&c=birp9sjcGzT9DCP3EIAtLA&r=sqQMNfenuGWZfvPw2xpRcgpM9ZSFgu41ZF5latIZEjU&m=VBYtuXSPTTxmolNwQc1HbU5bCG3Ra_V7W2-CH99aMTI&s=JSlkyznYoa5TIferCRSBDkyCkm76YZXzn0vbD_o5WlE&e=>

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