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The Cidr Report



This report has been generated at Fri Nov  8 21:47:30 2002 AEST.
The report analyses the BGP Routing Table of an AS4637 (Reach) router
and generates a report on aggregation potential within the table.

Check http://www.cidr-report.org/as4637 for a current version of this report.

Recent Table History
        Date      Prefixes    CIDR Agg
        01-11-02    115442       82842
        02-11-02    115409       82853
        03-11-02    115133       82798
        04-11-02    115076       82886
        05-11-02    115280       82945
        06-11-02    115314       82968
        07-11-02    115370       82934
        08-11-02    115262       82976


AS Summary
         13984  Number of ASes in routing system
          5472  Number of ASes announcing only one prefix
          1726  Largest number of prefixes announced by an AS
                AS701  : ALTERNET-AS UUNET Technologies, Inc.
      73138176  Largest address span announced by an AS (/32s)
                AS568  : SUMNET-AS DISO-UNRRA


Aggregation Summary
The algorithm used in this report proposes aggregation only
when there is a precise match using the AS path, so as 
to preserve traffic transit policies. Aggregation is also
proposed across non-advertised address space ('holes').

 --- 08Nov02 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     115332    82897    32435    28.1%   All ASes

AS3908      1082      564      518    47.9%   SUPERNETASBLK SuperNet, Inc.
AS701       1726     1253      473    27.4%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7843       787      338      449    57.1%   ADELPHIA-AS Adelphia Corp.
AS7018      1341      990      351    26.2%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS6197       453      107      346    76.4%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS18566      341        4      337    98.8%   COVAD Covad Communications
AS4323       512      176      336    65.6%   TW-COMM Time Warner
                                               Communications, Inc.
AS1221      1193      868      325    27.2%   ASN-TELSTRA Telstra Pty Ltd
AS209        627      331      296    47.2%   ASN-QWEST Qwest
AS6347       358       81      277    77.4%   DIAMOND SAVVIS Communications
                                               Corporation
AS7046       588      312      276    46.9%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS4355       398      134      264    66.3%   ERMS-EARTHLNK EARTHLINK, INC
AS4151       337       90      247    73.3%   USDA-1 USDA
AS705        441      207      234    53.1%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS1239       893      662      231    25.9%   SPRINTLINK Sprint
AS6198       409      179      230    56.2%   BATI-MIA BellSouth Network
                                               Solutions, Inc
AS852        694      468      226    32.6%   ASN852 Telus Advanced
                                               Communications
AS1          656      438      218    33.2%   GNTY-1 Genuity
AS4814       233       15      218    93.6%   CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS6140       262       65      197    75.2%   IMPSAT-USA ImpSat USA, Inc.
AS22927      216       20      196    90.7%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS17676      227       32      195    85.9%   GIGAINFRA APNIC ASN block
AS17557      317      126      191    60.3%   PKTELECOM-AS-AP APNIC ASN
                                               block
AS6595       246       56      190    77.2%   DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS4134       296      114      182    61.5%   ERX-CHINALINK Data
                                               Communications Bureau
AS690        513      336      177    34.5%   MERIT-AS-27 Merit Network Inc.
AS2048       263       88      175    66.5%   LANET-1 State of Louisiana
AS7132       241       70      171    71.0%   SBIS-AS Southwestern Bell
                                               Internet Services
AS2548       410      249      161    39.3%   ICIX-MD-AS Business Internet,
                                               Inc.
AS174        291      134      157    54.0%   PSINET PSINet Inc.

Total      16351     8507     7844    48.0%   Top 30 total



Please see http://www.cidr-report.org for the full report

------------------------------------
Copies of this report are mailed to:
  nanog at merit.edu
  eof-list at ripe.net
  apops at lists.apnic.net
  routing-wg at ripe.net
  afnog at afnog.org

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