The Cidr Report

This report has been generated at Mon Sep 16 18:33:13 2002 AEST.
The report analyses the BGP Routing Table of the Route-Views router
and generates a report on aggregation potential within the table.

Check http://bgp.potaroo.net/cidr for a current version of this report.

Recent Table History
        Date Prefixes CIDR Agg
        09-09-02 121168 88703
        10-09-02 121129 88787
        11-09-02 121290 88946
        12-09-02 121145 87146
        13-09-02 121338 87745
        14-09-02 121318 87720
        15-09-02 121238 87859
        16-09-02 122134 87830

Possible Bogus Routes

        39.0.0.0/8 AS4554 EP0-BLK-ASNBLOCK-4 Exchange Point Blocks

AS Summary
         13914 Number of ASes in routing system
          5301 Number of ASes announcing only one prefix
          1804 Largest number of prefixes announced by an AS
                AS209 : ASN-QWEST Qwest
      73154816 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 not
proposed across non-advertised address space ('holes').

--- 16Sep02 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 121976 88656 33320 27.3% All ASes

AS209 1804 1042 762 42.2% ASN-QWEST Qwest
AS3908 1133 650 483 42.6% SUPERNETASBLK SuperNet, Inc.
AS2548 1581 1127 454 28.7% ICIX-MD-AS Business Internet,
                                               Inc.
AS7132 601 183 418 69.6% SBIS-AS Southwestern Bell
                                               Internet Services
AS701 1762 1351 411 23.3% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7018 1349 959 390 28.9% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS1221 1301 939 362 27.8% ASN-TELSTRA Telstra Pty Ltd
AS4323 645 307 338 52.4% TW-COMM Time Warner
                                               Communications, Inc.
AS7046 607 312 295 48.6% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS6197 383 97 286 74.7% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS852 737 456 281 38.1% ASN852 Telus Advanced
                                               Communications
AS7843 664 386 278 41.9% ADELPHIA-AS Adelphia Corp.
AS18566 270 4 266 98.5% COVAD Covad Communications
AS4151 284 32 252 88.7% USDA-1 USDA
AS1 682 449 233 34.2% GNTY-1 Genuity
AS6347 396 180 216 54.5% DIAMOND SAVVIS Communications
                                               Corporation
AS4814 233 34 199 85.4% CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS690 519 326 193 37.2% NSFNET-T3-RT-AS Merit Network
                                               Inc.
AS4355 360 170 190 52.8% ERMS-EARTHLNK EARTHLINK, INC
AS1239 851 662 189 22.2% SprintLink Sprint
AS2386 418 233 185 44.3% INS-AS AT&T Data
                                               Communications Services
AS4134 302 118 184 60.9% ERX-CHINALINK Data
                                               Communications Bureau
AS6595 244 74 170 69.7% DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS3356 392 226 166 42.3% LEVEL3 Level 3 Communications,
                                               LLC
AS1791 186 23 163 87.6% SPRINTLINK3 Sprint Government
                                               Systems Division
AS11371 169 7 162 95.9% UUNET-AS-11371 UUNET
                                               Technologies, Inc.
AS376 341 184 157 46.0% RISQ-AS Reseau
                                               Interordinateurs Scientique
                                               Quebecois (RISQ)
AS17676 220 65 155 70.5% GIGAINFRA APNIC ASN block
AS6539 350 200 150 42.9% GROUPTLCOM GT Group Telecom
                                               Services Corp.
AS577 424 275 149 35.1% BACOM Bell Advanced
                                               Communications Inc.

Total 19208 11071 8137 42.4% Top 30 total

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