The Cidr Report

This report has been generated at Fri Feb 28 21:46:34 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
        21-02-03 119400 85542
        22-02-03 119615 85397
        23-02-03 119379 85455
        24-02-03 119479 85425
        25-02-03 119470 85630
        26-02-03 119690 85676
        27-02-03 119740 85694
        28-02-03 119708 85768

AS Summary
         14678 Number of ASes in routing system
          5782 Number of ASes announcing only one prefix
          1604 Largest number of prefixes announced by an AS
                AS701 : ALTERNET-AS UUNET Technologies, Inc.
      73080832 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').

--- 28Feb03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 119861 85734 34127 28.5% All ASes

AS3908 1084 568 516 47.6% SUPERNETASBLK SuperNet, Inc.
AS18566 491 8 483 98.4% COVAD Covad Communications
AS701 1604 1151 453 28.2% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS4151 532 105 427 80.3% USDA-1 USDA
AS4323 533 169 364 68.3% TW-COMM Time Warner
                                               Communications, Inc.
AS7018 1385 1025 360 26.0% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS7843 556 224 332 59.7% ADELPHIA-AS Adelphia Corp.
AS6197 485 157 328 67.6% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS7046 559 244 315 56.4% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS1221 1121 816 305 27.2% ASN-TELSTRA Telstra Pty Ltd
AS1239 969 686 283 29.2% SPRINTLINK Sprint
AS4355 402 119 283 70.4% ERMS-EARTHLNK EARTHLINK, INC
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS705 450 196 254 56.4% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814 264 15 249 94.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS6198 439 205 234 53.3% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS1 662 435 227 34.3% GNTY-1 Genuity
AS22291 243 31 212 87.2% CHARTER-LA Charter
                                               Communications
AS17676 230 26 204 88.7% GIGAINFRA XTAGE CORPORATION
AS6347 369 168 201 54.5% DIAMOND SAVVIS Communications
                                               Corporation
AS2386 478 283 195 40.8% INS-AS AT&T Data
                                               Communications Services
AS209 528 337 191 36.2% ASN-QWEST Qwest
AS4134 304 113 191 62.8% CHINANET-BACKBONE
                                               No.31,Jin-rong Street
AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc.
AS2048 258 87 171 66.3% LANET-1 State of Louisiana
AS852 599 444 155 25.9% ASN852 Telus Advanced
                                               Communications
AS7303 240 90 150 62.5% AR-TAST-LACNIC Telecom
                                               Argentina Stet-France Telecom
                                               S.A.
AS22773 182 32 150 82.4% CCINET-2 Cox Communications
                                               Inc. Atlanta
AS6140 285 136 149 52.3% IMPSAT-USA ImpSat
AS6327 187 41 146 78.1% SHAWFIBER Shaw Fiberlink
                                               Limited

Total 16232 8233 7999 49.3% Top 30 total

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