The Cidr Report

This report has been generated at Fri Jan 31 21:45:39 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
        24-01-03 118201 85103
        25-01-03 118189 83778
        26-01-03 116341 84709
        27-01-03 117892 84848
        28-01-03 118004 85138
        29-01-03 118290 85119
        30-01-03 118378 85040
        31-01-03 118463 85056

AS Summary
         14479 Number of ASes in routing system
          5680 Number of ASes announcing only one prefix
          1585 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').

--- 31Jan03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 118597 85097 33500 28.2% All ASes

AS3908 1179 682 497 42.2% SUPERNETASBLK SuperNet, Inc.
AS18566 450 7 443 98.4% COVAD Covad Communications
AS701 1585 1174 411 25.9% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7018 1427 1035 392 27.5% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323 527 170 357 67.7% TW-COMM Time Warner
                                               Communications, Inc.
AS7843 584 257 327 56.0% ADELPHIA-AS Adelphia Corp.
AS6197 471 154 317 67.3% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS1221 1136 830 306 26.9% ASN-TELSTRA Telstra Pty Ltd
AS6347 376 85 291 77.4% DIAMOND SAVVIS Communications
                                               Corporation
AS4355 410 126 284 69.3% ERMS-EARTHLNK EARTHLINK, INC
AS1239 958 675 283 29.5% SPRINTLINK Sprint
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS7046 551 277 274 49.7% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS4151 329 58 271 82.4% USDA-1 USDA
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS705 435 190 245 56.3% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS852 680 445 235 34.6% ASN852 Telus Advanced
                                               Communications
AS1 663 435 228 34.4% GNTY-1 Genuity
AS6198 424 202 222 52.4% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS22291 237 30 207 87.3% CHARTER-LA Charter
                                               Communications
AS17676 220 24 196 89.1% GIGAINFRA XTAGE CORPORATION
AS690 505 311 194 38.4% MERIT-AS-27 Merit Network Inc.
AS209 521 333 188 36.1% ASN-QWEST Qwest
AS4134 301 117 184 61.1% ERX-CHINALINK Data
                                               Communications Bureau
AS2386 435 258 177 40.7% INS-AS AT&T Data
                                               Communications Services
AS6140 306 132 174 56.9% IMPSAT-USA ImpSat
AS2048 259 87 172 66.4% LANET-1 State of Louisiana
AS6327 187 36 151 80.7% SHAWFIBER Shaw Fiberlink
                                               Limited
AS17557 330 183 147 44.5% PKTELECOM-AS-AP Pakistan
                                               Telecom
AS11492 300 157 143 47.7% CABLEONE CABLE ONE

Total 16342 8499 7843 48.0% Top 30 total

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