The Cidr Report

This report has been generated at Fri Feb 14 00:46:03 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
        07-02-03 118526 85124
        08-02-03 118568 85173
        09-02-03 118579 85149
        10-02-03 118627 85137
        11-02-03 118637 85198
        12-02-03 118760 85310
        13-02-03 118989 85108
        14-02-03 119071 85326

AS Summary
         14555 Number of ASes in routing system
          5721 Number of ASes announcing only one prefix
          1571 Largest number of prefixes announced by an AS
                AS701 : ALTERNET-AS UUNET Technologies, Inc.
      73048064 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').

--- 14Feb03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 119071 85433 33638 28.3% All ASes

AS3908 1056 565 491 46.5% SUPERNETASBLK SuperNet, Inc.
AS18566 474 7 467 98.5% COVAD Covad Communications
AS4151 523 102 421 80.5% USDA-1 USDA
AS701 1571 1161 410 26.1% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7018 1425 1033 392 27.5% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323 528 169 359 68.0% TW-COMM Time Warner
                                               Communications, Inc.
AS7843 569 240 329 57.8% ADELPHIA-AS Adelphia Corp.
AS6197 476 157 319 67.0% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS1221 1130 824 306 27.1% ASN-TELSTRA Telstra Pty Ltd
AS7046 566 274 292 51.6% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS4355 405 119 286 70.6% ERMS-EARTHLNK EARTHLINK, INC
AS1239 958 674 284 29.6% SPRINTLINK Sprint
AS6347 368 85 283 76.9% DIAMOND SAVVIS Communications
                                               Corporation
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS705 446 196 250 56.1% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS1 663 435 228 34.4% GNTY-1 Genuity
AS6198 434 220 214 49.3% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS22291 242 32 210 86.8% CHARTER-LA Charter
                                               Communications
AS17676 224 24 200 89.3% GIGAINFRA XTAGE CORPORATION
AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc.
AS4134 306 119 187 61.1% ERX-CHINALINK Data
                                               Communications Bureau
AS209 523 337 186 35.6% ASN-QWEST Qwest
AS2386 439 259 180 41.0% INS-AS AT&T Data
                                               Communications Services
AS2048 260 87 173 66.5% LANET-1 State of Louisiana
AS852 606 446 160 26.4% ASN852 Telus Advanced
                                               Communications
AS17557 339 188 151 44.5% PKTELECOM-AS-AP Pakistan
                                               Telecom
AS22773 177 27 150 84.7% CCINET-2 Cox Communications
                                               Inc. Atlanta
AS6140 285 136 149 52.3% IMPSAT-USA ImpSat
AS6327 186 40 146 78.5% SHAWFIBER Shaw Fiberlink
                                               Limited

Total 16233 8293 7940 48.9% Top 30 total

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