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If msftncsi.com is down for everyone, there's not much you can do except wait. But if it's only down for you, try these steps:

Browser Fixes

• Press Ctrl+Shift+R (or Cmd+Shift+R on Mac) to force a full refresh
• Clear your browser cache and cookies for this site
• Try opening the site in an incognito/private window
• Try a different browser (Chrome, Firefox, Safari, Edge)

DNS & Network Fixes

• Flush your DNS cache — on Windows: ipconfig /flushdns
• Try switching to a public DNS: 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google)
• Check if the site works on your mobile data — if it does, the problem is your ISP or router
• Restart your router/modem

Still Not Working?

• The site may be blocking your IP address or country
• Your ISP might be having routing issues to this specific server
• Try accessing the site using a VPN or proxy service

Microsoft's Network Connectivity Status Indicator (NCSI) service that checks internet connectivity status on Windows devices.

The msftncsi.com domain hosts Microsoft's Network Connectivity Status Indicator service, a critical Windows component that determines whether a device has proper internet connectivity. When Windows connects to a network, it automatically contacts this service to verify internet access by requesting a simple text file and performing DNS lookups. This process helps Windows distinguish between being connected to a local network versus having actual internet access. The service is essential for Windows features like network status icons, captive portal detection, and various Microsoft services that depend on connectivity verification. IT administrators and network engineers often encounter this domain in firewall logs and network monitoring tools, as Windows devices regularly communicate with it. The service operates transparently to end users but is fundamental to Windows networking functionality across consumer and enterprise environments.

Common issues with msftncsi.com

Users typically encounter issues with msftncsi.com when corporate firewalls or content filters block access to Microsoft domains, causing Windows to incorrectly report 'Limited connectivity' despite having internet access. Network administrators may see frequent requests to this domain in logs, which is normal behavior. Common troubleshooting includes whitelisting *.msftncsi.com in firewalls, checking DNS resolution, and verifying that proxy settings allow access to Microsoft connectivity check services. Some organizations disable NCSI entirely through group policy to reduce external traffic.

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