Windows Update

Domains

Primary Domains

• forefrontdl.microsoft.com
• ntservicepack.microsoft.com
• statsfe2.ws.microsoft.com
• update.microsoft
• update.microsoft.com
• update.microsoft.com.nsatc.net
• windowsupdate.com
• windowsupdate.microsoft.com
• windowsupdate.nsatc.net
• wustat.windows.com

Platform Domains

Akamai	{hidden}.microsoft.com.akadns.net	and 1 more
Edgio	{hidden}.llnwi.net	and 1 more
Lumen CDN	{hidden}.footprint.net

Applications are sometimes deployed on partner networks, parent company networks, or regional hosting providers. The following is a sample of Windows Update IP addresses deployed on this type of network.

There are tens of thousands of Internet network providers and we make an effort to track as many as we can, but we have less coverage for niche and local providers. The following is a sample of Windows Update IP addresses on this type of network.

Hosting vendors like AWS and Microsoft Azure provide cloud-based computing and network resources to deliver applications. The hosting platforms used by Windows Update are summarized below by geographical points-of-presence (PoP).

Each PoP can host many IPs to deliver an application. A sample IP is provided.

In order to get information to end users more quickly, many applications are distributed from multiple geographical points-of-presence (PoPs) using Content Delivery Networks (CDNs).

Each PoP can host many IPs to deliver an application. A sample IP is provided.

Take special note of CDNs that use Anycast technology. Anycast makes it possible to route a single IP address to a variety of different geographic locations. In other words, one global Anycast IP is hosted in multiple geographic locations.