The Cidr Report

This report has been generated at Fri Feb 21 21:46:27 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
        14-02-03 119071 85433
        15-02-03 119072 85385
        16-02-03 118946 85348
        17-02-03 118884 85299
        18-02-03 118939 85352
        19-02-03 119053 85338
        20-02-03 119156 85478
        21-02-03 119400 85502

AS Summary
         14614 Number of ASes in routing system
          5749 Number of ASes announcing only one prefix
          1577 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

Possible Bogus Routes

        10.0.0.0/8 AS4637 REACH Reach Network Border AS
        192.168.0.0/16 AS4637 REACH Reach Network Border AS

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').

--- 21Feb03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 119491 85471 34020 28.5% All ASes

AS3908 1062 565 497 46.8% SUPERNETASBLK SuperNet, Inc.
AS18566 482 6 476 98.8% COVAD Covad Communications
AS701 1577 1145 432 27.4% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS4151 524 92 432 82.4% USDA-1 USDA
AS7018 1427 1034 393 27.5% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323 529 170 359 67.9% TW-COMM Time Warner
                                               Communications, Inc.
AS7843 569 234 335 58.9% ADELPHIA-AS Adelphia Corp.
AS7046 578 246 332 57.4% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS6197 478 158 320 66.9% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS1221 1119 821 298 26.6% ASN-TELSTRA Telstra Pty Ltd
AS4355 402 120 282 70.1% ERMS-EARTHLNK EARTHLINK, INC
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS1239 960 680 280 29.2% SPRINTLINK Sprint
AS705 447 194 253 56.6% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS1 666 435 231 34.7% GNTY-1 Genuity
AS6347 330 101 229 69.4% DIAMOND SAVVIS Communications
                                               Corporation
AS6198 433 204 229 52.9% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS22291 243 32 211 86.8% CHARTER-LA Charter
                                               Communications
AS17676 227 26 201 88.5% GIGAINFRA XTAGE CORPORATION
AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc.
AS209 523 335 188 35.9% ASN-QWEST Qwest
AS4134 304 117 187 61.5% CHINANET-BACKBONE
                                               No.31,Jin-rong Street
AS2386 443 263 180 40.6% INS-AS AT&T Data
                                               Communications Services
AS2048 260 87 173 66.5% LANET-1 State of Louisiana
AS852 604 445 159 26.3% ASN852 Telus Advanced
                                               Communications
AS7303 240 90 150 62.5% AR-TAST-LACNIC Telecom
                                               Argentina Stet-France Telecom
                                               S.A.
AS17557 340 190 150 44.1% PKTELECOM-AS-AP Pakistan
                                               Telecom
AS22773 181 31 150 82.9% CCINET-2 Cox Communications
                                               Inc. Atlanta
AS6140 283 137 146 51.6% IMPSAT-USA ImpSat

Total 16285 8295 7990 49.1% Top 30 total

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