Help Center

Welcome to the IsThisSiteDown.org Help Center. Here you’ll find clear, simple guides for understanding website outages, browser errors, DNS issues, and network problems. If a website won’t load, is slow, or shows an error message, start here.

Not sure if a website is actually down? Check uptime instantly.

Website Outage & Uptime Guides

• How to Tell If a Website Is Blocked on Your Network
• How to Check a Website’s Server Status
• Why Do Websites Load Slowly?
• Why Do Websites Go Down During High Traffic?
• How to Tell If a Website Is Under Maintenance

Network & ISP Troubleshooting

• Why Does My ISP Block Certain Websites?
• How to Troubleshoot Internet Issues at Home
• Why Do Some Websites Only Work on Mobile?

DNS & Routing Issues

• How to Fix DNS_PROBE_FINISHED_NXDOMAIN

Browser Error Guides

• What Is a 500 Error?
• What Is a 404 Error?
• How to Fix ERR_CONNECTION_RESET

Security & Attack Issues

• What Is a DDoS Attack?
• Why Do Websites Randomly Log You Out?

Need to Check a Website Right Now?

Use our uptime checker to see if any website is down globally.