RE:

["Phil Rosenthal" <pr () isprime com>]

Most notably verio does this.

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

--Phil
-----Original Message-----
From: owner-nanog () merit edu [mailto:owner-nanog () merit edu] On Behalf Of
Brian
Sent: Wednesday, November 13, 2002 1:17 PM
To: Harsha Narayan; nanog () merit edu
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" <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.