tailscale netcheck

tailscale netcheck 
tailscale netcheck --verbose

        .../...
	* Nearest DERP: Madrid

Related

• tailscale --help
• Troubleshooting tailscale
• tailscale ping --verbose

See also

• tailscale status [ --json ]
• tailscale [ up | ping | login | status | update | dns | --help ], /var/log/tailscaled.log, Troubleshooting tailscale
• DERP, DERP servers, NAT traversal, Tailscale coordination server