If you can't access Vercel-hosted sites and debugging tools show your IP address is blocked, the cause is most likely your ISP or network policy, not Vercel.
You might experience:
- Inability to load Vercel-hosted sites: Pages time out or return connection errors
- Blocked IP addresses: Debugging tools show your IP is being rejected
- Multiple users affected: Others on the same network experience the same issue
- ISP throttling: Some ISPs block or throttle access to certain websites during peak usage hours
- Network policies: Universities, offices, and other shared networks often have firewall rules that inadvertently block certain sites
If you're on a university, office, or other managed network, contact your network administrator or IT department. Provide them with any debugging information, including the blocked IP address and the domains you're trying to reach: vercel.com or vercel.app.
Contact your ISP's customer support and ask them to unblock the following:
vercel.comvercel.app76.76.21.21
If the issue persists, try the following:
1. Use a VPN: A VPN assigns you a different IP address, which can bypass the block. Follow your VPN provider's setup guide to get started
2. Disable antivirus software or browser extensions: Temporarily deactivate these to rule them out as the cause
3. Check your router's block list:
- Log into your router's web interface (often
192.168.1.1) - Navigate to the security or firewall settings
- Remove any entries related to Vercel
4. Flush your DNS cache:
- macOS: Run
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponderin Terminal - Windows: Run
ipconfig /flushdnsin Command Prompt - Linux: Run
sudo systemd-resolve --flush-cachesin your terminal
5. Reset network settings: Restore your network configuration to defaults through your operating system's network settings
If you've completed the steps above and the issue continues, please contact Support. Have the output of the Vercel debug script (vercel-debug.txt) ready to share.
