The Cidr Report

This report has been generated at Fri Jan  3 21:45:27 2003 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
        27-12-02    117120       84759
        28-12-02    117172       84857
        29-12-02    117391       84760
        30-12-02    117247       84955
        31-12-02    117450       85024
        01-01-03    117552       85059
        02-01-03    117648       85132
        03-01-03    117672       85168


AS Summary
         14290  Number of ASes in routing system
          5618  Number of ASes announcing only one prefix
          1610  Largest number of prefixes announced by an AS
                AS701  : ALTERNET-AS UUNET Technologies, Inc.
      73047040  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').

 --- 03Jan03 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     117812    85155    32657    27.7%   All ASes

AS3908      1173      689      484    41.3%   SUPERNETASBLK SuperNet, Inc.
AS701       1610     1195      415    25.8%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS18566      414        5      409    98.8%   COVAD Covad Communications
AS7018      1430     1029      401    28.0%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323       532      188      344    64.7%   TW-COMM Time Warner
                                               Communications, Inc.
AS7843       622      301      321    51.6%   ADELPHIA-AS Adelphia Corp.
AS1221      1146      829      317    27.7%   ASN-TELSTRA Telstra Pty Ltd
AS6197       455      150      305    67.0%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS1239       976      687      289    29.6%   SPRINTLINK Sprint
AS6347       368       85      283    76.9%   DIAMOND SAVVIS Communications
                                               Corporation
AS4355       407      136      271    66.6%   ERMS-EARTHLNK EARTHLINK, INC
AS22927      289       22      267    92.4%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS7046       552      291      261    47.3%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS705        422      188      234    55.5%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814       246       15      231    93.9%   CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS6198       423      200      223    52.7%   BATI-MIA BellSouth Network
                                               Solutions, Inc
AS1          659      437      222    33.7%   GNTY-1 Genuity
AS17676      231       26      205    88.7%   GIGAINFRA XTAGE CORPORATION
AS22291      226       29      197    87.2%   CHARTER-LA Charter
                                               Communications
AS690        513      319      194    37.8%   MERIT-AS-27 Merit Network Inc.
AS4151       325      134      191    58.8%   USDA-1 USDA
AS6140       315      125      190    60.3%   IMPSAT-USA ImpSat
AS209        517      335      182    35.2%   ASN-QWEST Qwest
AS4134       290      108      182    62.8%   ERX-CHINALINK Data
                                               Communications Bureau
AS852        627      446      181    28.9%   ASN852 Telus Advanced
                                               Communications
AS2048       254       84      170    66.9%   LANET-1 State of Louisiana
AS2386       387      229      158    40.8%   INS-AS AT&T Data
                                               Communications Services
AS6327       185       34      151    81.6%   SHAWFIBER Shaw Fiberlink
                                               Limited
AS17557      324      179      145    44.8%   PKTELECOM-AS-AP Pakistan
                                               Telecom
AS3215       313      174      139    44.4%   AS3215  France Telecom
                                               Transpac

Total      16231     8669     7562    46.6%   Top 30 total



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

------------------------------------
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