This is one of anycast DNS servers network anycastdns.cz.
Full list of ping/traceroute servers can be found on address:
- ping (8B ICMP + 56B payload) - generic ICMP ping (RFC972, RFC6918)
- ping (8B ICMP + 512B payload) - ICMP packet with exact size of maximum DNS request/response UDP packet size (RFC1035, RFC6891)
- traceroute - UDP traceroute
It is not possible to use this tool to test connectivity of private or reserver addresses.
RFC1122, RFC1918, RFC4291, RFC5156, RFC5735, RFC5771, RFC6890
0.0.0.0/8, 10.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.0.2.0/24, 192.168.0.0/16, 18.104.22.168/4
It is not possible to use this tool for commercial activities without explicit agreement.