Autonomous system
AS8075 MICROSOFT-CORP-MSN-AS-BLOCK
Hosting DROP-listed space ARIN Content
Summary
Microsoft Corporation
cloud azure corporate
Microsoft's primary Autonomous System, carrying Azure, Microsoft 365, Outlook, Xbox Live, Bing, and Microsoft's corporate traffic.
What it's used for
- Hosting Azure cloud workloads and Microsoft's first-party services.
- Serving Windows Update, Office/Microsoft 365, Teams, and related endpoints.
Notable
- Like other hyperscalers, an IP here means Microsoft/Azure is the host; the actual application could be first-party or a customer's Azure deployment.
- Microsoft publishes its service IP ranges and endpoints (Azure IP ranges JSON, Microsoft 365 URL/IP lists) so firewalls can allow-list them precisely.
Interesting
- Microsoft operates one of the largest private wide-area backbones in the world to interconnect its Azure regions.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 167 exchanges in 45 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.218.144 |
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.194.52 |
| IX.br (PTT.br) Fortaleza | Fortaleza, Brazil | 45.68.74.84 |
| LINX LON1 | London, United Kingdom | 195.66.224.112 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.209.21 |
| Jakarta Internet Exchange | Jakarta, Indonesia | 119.11.184.85 |
| Neutral Internet Exchange | Amsterdam, Netherlands | 193.239.117.16 |
| NAPAfrica IX Johannesburg | Johannesburg, South Africa | 196.60.8.133 |
Transit providers
65 upstream, 7 downstream and 123 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1,315 prefixes · 80.75M addresses IPv6 234 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1,549 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS8068- Registry name
- MICROSOFT-CORP-MSN-AS-BLOCK
- Registrant
- Microsoft Corporation
- Abuse contact
- abuse@microsoft.com
- Registered
- 1997-03-31
- Last changed
- 2013-09-04
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- Microsoft
- Also known as
- 8068 8069
- Network type
- Content
- Scope
- Global
- Traffic ratio
- Mostly Outbound
- Peering policy
- Selective
- IRR as-set
AS-MICROSOFT- Present at
- 207 exchanges
- Facilities
- 167 facilities
- Website
- http://www.microsoft.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 98% valid · 1,320 valid, 22 with no ROA 2 RPKI-invalid
- ROAs
- 1,609 authorising AS8075
- ASPA
- no ASPA record
- IRR
- 99.4% registered · 1,336 of 1,344 announcements 2 other origin
- Route objects
- 2,336 naming AS8075
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
1 DROP match Announced space overlapping the DROP prefix list.
| Announced | DROP entry | Record |
|---|---|---|
| 168.151.52.0/23 | 168.151.52.0/23 | SBL477400 |
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,772 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
2 IC3 indicators addresses in this network appear in FBI IC3 cybersecurity advisories.
| Prefix | Advisory | Published |
|---|---|---|
191.232.188.144 | Chinese Government-linked Cyber Threat Actors Combine Automated and Hands-on Hacking Tools to Steal Sensitive Data | 2026-10-08 |
156.23.19.18 | China-Linked Hacking Group QTFY Targets Military and Critical Infrastructure with Malicious Distributed Systems | 2026-08-26 |
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere