| Full name | Microsoft Corporation |
| ASN | AS8075 |
| Type | Content Provider / Cloud |
| Country | United States |
| Headquarters | Redmond, Washington, US |
| Founded | 1975 |
| Website | microsoft.com |
| Registry | ARIN |
| Total IPs | ~30 million (IPv4) |
| Upstream | Tier-1 provider with global peering at all major IXPs |
| IPv6 | 2603:1000::/24, 2620:1ec::/36 |
| RIR | ARIN |
| Abuse email | abuse@microsoft.com |
| Abuse form | Report abuse → |
AS8075 is Microsoft's primary ASN covering Azure cloud infrastructure, Office 365, Teams, Xbox Live, Bing, LinkedIn, and GitHub. Microsoft holds one of the largest IPv4 allocations of any company, with the 20.0.0.0/8 block alone containing over 16 million addresses. Azure is the world's second-largest cloud provider and its IP ranges are seen in virtually every enterprise network globally.
Every time you visit a website, your IP address — and therefore your ISP (Microsoft Corporation) — is visible to that site. Microsoft Corporation as your ISP can see all unencrypted traffic passing through their network, including the domains you visit. This is standard practice for all ISPs and is typically used for network management, legal compliance, and in some cases targeted advertising.
If your device is assigned an IP in Microsoft Corporation’s ranges, websites you visit will identify your connection as coming from Microsoft Corporation. To prevent this, a VPN replaces your ISP-assigned IP with the VPN server’s IP, making your traffic appear to come from a different provider entirely.
AS8075 is registered with ARIN — the Regional Internet Registry responsible for IP allocations in North America. The ASN is used to announce IP prefixes to the global BGP routing table, allowing other networks to route traffic to Microsoft Corporation’s infrastructure.
Microsoft Corporation peers with major transit providers and internet exchanges to ensure global reachability. BGP peering relationships determine how traffic flows between Microsoft Corporation and the rest of the internet.
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