North American Network Operators Group
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Re:

  • From: Brian
  • Date: Wed Nov 13 13:20:35 2002 
If the space is from what was originally class a or b, there are some that
will filter based on that.  An ex employer of mine did that.

    Bri

----- Original Message -----
From: "Harsha Narayan" <hnarayan@cs.ucsd.edu>
To: <nanog@merit.edu>
Sent: Wednesday, November 13, 2002 8:53 AM


>
> Hello,
>
>    Are there some ISPs who filter prefixes longer than /19 or a /20?. I
> thought they filtered only prefixes which are longer than /24?
>
>
> Harsha.
>
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