Question on IP classes, and root name servers

[Yohhan]

I have a linux machine running a DNS server (Bind). I'm looking through some of the zone files, and I found one with the IP addresses of the root name servers. Strangely, some of the root name servers have IP addresses of 192.x.x.x, which I thought were not addressable over the internet. Can anyone explain why?

 

[cquark]

Only 192.168.0.0/16 is reserved for private networks; other 192.X.0.0 networks are publicly accessible. See RFC 1918 for further details on private network IP address allocation.