The Cidr Report

This report has been generated at Fri Oct 4 20:32:37 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://www.cidr-report.org for a current version of this report.

Recent Table History
        Date Prefixes CIDR Agg
        27-09-02 122059 87644
        28-09-02 123673 89338
        29-09-02 123700 89158
        30-09-02 123661 89486
        01-10-02 123327 89413
        02-10-02 124542 90028
        03-10-02 124827 89771
        04-10-02 124944 88633

Possible Bogus Routes

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

AS Summary
         14015 Number of ASes in routing system
          5367 Number of ASes announcing only one prefix
          2193 Largest number of prefixes announced by an AS
                AS209 : ASN-QWEST Qwest
      72696064 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').

--- 04Oct02 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 124806 88707 36099 28.9% All ASes

AS209 2193 1142 1051 47.9% ASN-QWEST Qwest
AS4999 1028 132 896 87.2% SPRINTIPDIAL Sprint
AS174 1824 1234 590 32.3% PSINET PSINet Inc.
AS7132 595 73 522 87.7% SBIS-AS Southwestern Bell
                                               Internet Services
AS3908 1115 610 505 45.3% SUPERNETASBLK SuperNet, Inc.
AS701 1786 1284 502 28.1% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS2548 1586 1123 463 29.2% ICIX-MD-AS Business Internet,
                                               Inc.
AS7018 1366 960 406 29.7% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS1221 1305 937 368 28.2% ASN-TELSTRA Telstra Pty Ltd
AS4323 648 298 350 54.0% TW-COMM Time Warner
                                               Communications, Inc.
AS7843 715 385 330 46.2% ADELPHIA-AS Adelphia Corp.
AS3215 626 305 321 51.3% AS3215 France Telecom Transpac
AS852 762 461 301 39.5% ASN852 Telus Advanced
                                               Communications
AS6197 390 98 292 74.9% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS18566 291 4 287 98.6% COVAD Covad Communications
AS7046 579 304 275 47.5% UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS6347 358 88 270 75.4% DIAMOND SAVVIS Communications
                                               Corporation
AS4151 280 32 248 88.6% USDA-1 USDA
AS1580 319 85 234 73.4% HQ, 5th Signal Command
AS1 672 449 223 33.2% GNTY-1 Genuity
AS4814 255 35 220 86.3% CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS705 407 197 210 51.6% ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS1239 849 651 198 23.3% SprintLink Sprint
AS4355 382 184 198 51.8% ERMS-EARTHLNK EARTHLINK, INC
AS22927 215 20 195 90.7% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS690 518 325 193 37.3% NSFNET-T3-RT-AS Merit Network
                                               Inc.
AS6595 250 66 184 73.6% DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS3356 378 211 167 44.2% LEVEL3 Level 3 Communications,
                                               LLC
AS1791 184 21 163 88.6% SPRINTLINK3 Sprint Government
                                               Systems Division
AS6327 180 19 161 89.4% SHAWFIBER Shaw Fiberlink
                                               Limited

Total 22056 11733 10323 46.8% Top 30 total

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