New routeviews service available (Address/Prefix -> AS/ASPATH mappings)

[David Meyer <dmm () 1-4-5 net>]

        All,

        In response to requests from many folks asking for prefix
        to AS mappings, routeviews is now providing 2 new services 
        mapping and address or prefix to its origin AS and to its
        ASPath. These services are available via two zones:

        (i).    asn.routeviews.org

                asn.routeviews.org maps an address or prefix into
                its origin AS, prefix, and prefix length, as seen by
                route-views2.routeviews.org (the data is held in
                TXT records).  
                
                For example, the following command

                  % dig txt 223.128.asn.routeviews.org

                returns (among other things)
                
                  223.128.asn.routeviews.org. 86400 IN TXT "3582" "128.223.0.0" "16"

                The syntax here is: "AS" "Prefix" "Prefix Length"

        (ii).   aspath.routeviews.org

                aspath.routeviews.org is similar to asn.routeviews.org,
                except that it maps an address or prefix into the ASpath
                (rather than origin AS), prefix, and prefix length, as
                seen by route-views2.routeviews.org (again, the data
                is held in TXT records).  

                For example, the following command

                  % dig txt 223.128.aspath.routeviews.org

                returns (among other things)

                  223.128.aspath.routeviews.org. 86400 IN TXT "286 209 3356 3701 3582" "128.223.0.0" "16"

                The syntax here is: "ASPath" "Prefix" "Prefix Length"


        These zones are built twice per-day, 11:45 and 23:45 UTC.

        Finally, please let us know (help () routeviews org) if you
        have questions, comments or suggestions for ways we might
        otherwise improve this service. One note: note that these
        zones are quite large, and reloading these produces a
        period of a few minutes during which the server may not
        reply.  

        Thanks,

        Dave