Watchmouse runs a free service call Just Ping. It allows you to run ICMP echos to an IP address of your choice from 50 nodes around the world. It is quick and easy way to test basic connectivity to any IP note on the Internet.
The tool also supports IPv6, although the number of test nodes drops from 50 to 17 if you want to test IPv6 address.
just-ping is slow, I suppose because of so many nodes. Try for example http://check-host.net/check-ping, it’s faster. May be IPv6 is not available, don’t know.
Georgi, thanks for the tip, it is a great connectivity testing tool.