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172.16.0.0/12 (172.16.0.0 to 172.31.255.255)
OK, I'm still confused on this one. If 172.16.0.0 is a class B, shouldn't it be a /16?

I would have thought that 172.20.0.0/12 would run from 172.20.0.0 to 172.20.15.255. Where am I getting lost? The other examples make total sense to me.
Posted by karl.barnes
19th Oct 2006