North American Network Operators Group
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RE:

  • From: Phil Rosenthal
  • Date: Wed Nov 13 13:24:09 2002 
Most notably verio does this.

http://info.us.bb.verio.net/routing.html

--Phil
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Brian
Sent: Wednesday, November 13, 2002 1:17 PM
To: Harsha Narayan; [email protected]
Subject: Re: 



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" <[email protected]>
To: <[email protected]>
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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