Minimum globally routable address space?

Tue Feb 20 19:01:11 UTC 2001

On Tue, 20 Feb 2001, Dan Streufert <dans at icss.com> wrote:

> On one hand, portability would be nice.  On the other, is a /20 globally
> routable in practice? I seem to remember hearing that /19 was the smallest

Yes, you'll be fine with a /20 from the blocks that ARIN allocates
from.

When we applied for IP space about a year ago, our /20 came out of 216/8.  
ARIN is currently allocating from 64/8, 65/8, and 66/8, so providers 
changed their filters to permit that.  You can read various provider 
filtering policies at http://www.nanog.org/filter.html ; Verio's is
the most restrictive.

Cheers,

Troy