www.pingpon.com is not accessible... Sorry.

I do not know why this site is not working.
If you know Administrator of this site, please contact directly.
You may be able to see it in Google cache.

For administrator ...

MyDNS.JP did not received IP address from you over One week. Please check your notify system.
If you restart notification of IP address, MyDNS.JP will apply your IP address to DNS information soon.
but, its reflection may take a while. :-(