The Cidr Report

This report has been generated at Fri Feb 7 21:46:10 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
        31-01-03 118463 85095
        01-02-03 118556 85054
        02-02-03 118567 85128
        03-02-03 118587 85148
        04-02-03 118588 85028
        05-02-03 118502 85128
        06-02-03 118561 85108
        07-02-03 118526 85124

AS Summary
         14519 Number of ASes in routing system
          5722 Number of ASes announcing only one prefix
          1584 Largest number of prefixes announced by an AS
                AS701 : ALTERNET-AS UUNET Technologies, Inc.
      72916992 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').

--- 07Feb03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 118612 85169 33443 28.2% All ASes

AS3908 1058 579 479 45.3% SUPERNETASBLK SuperNet, Inc.
AS18566 457 7 450 98.5% COVAD Covad Communications
AS701 1584 1171 413 26.1% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7018 1433 1041 392 27.4% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323 528 170 358 67.8% TW-COMM Time Warner
                                               Communications, Inc.
AS6197 472 154 318 67.4% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS7843 568 253 315 55.5% ADELPHIA-AS Adelphia Corp.
AS1221 1133 829 304 26.8% ASN-TELSTRA Telstra Pty Ltd
AS1239 964 678 286 29.7% SPRINTLINK Sprint
AS7046 563 280 283 50.3% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS6347 367 85 282 76.8% DIAMOND SAVVIS Communications
                                               Corporation
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS4355 396 120 276 69.7% ERMS-EARTHLNK EARTHLINK, INC
AS4151 345 71 274 79.4% USDA-1 USDA
AS705 437 189 248 56.8% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS852 680 444 236 34.7% ASN852 Telus Advanced
                                               Communications
AS6198 432 201 231 53.5% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS1 665 435 230 34.6% GNTY-1 Genuity
AS22291 238 31 207 87.0% CHARTER-LA Charter
                                               Communications
AS17676 222 26 196 88.3% GIGAINFRA XTAGE CORPORATION
AS209 532 341 191 35.9% ASN-QWEST Qwest
AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc.
AS4134 301 117 184 61.1% ERX-CHINALINK Data
                                               Communications Bureau
AS2386 437 263 174 39.8% INS-AS AT&T Data
                                               Communications Services
AS2048 259 87 172 66.4% LANET-1 State of Louisiana
AS17557 336 186 150 44.6% PKTELECOM-AS-AP Pakistan
                                               Telecom
AS6140 284 135 149 52.5% IMPSAT-USA ImpSat
AS6327 186 40 146 78.5% SHAWFIBER Shaw Fiberlink
                                               Limited
AS11492 307 164 143 46.6% CABLEONE CABLE ONE

Total 16238 8434 7804 48.1% Top 30 total

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