This report has been generated at Fri Sep 27 20:32:43 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
20-09-02 121329 87082
21-09-02 121481 87337
22-09-02 121438 87731
23-09-02 121323 87980
24-09-02 121407 88246
25-09-02 121566 88349
26-09-02 121459 87822
27-09-02 122059 87558
Possible Bogus Routes
7.1.1.0/30 AS12357 COMUNITEL Comunitel Global Autonomous System
10.5.5.0/30 AS11537 ABILENE University Corporation for Advanced Internet Development
10.11.11.0/30 AS11537 ABILENE University Corporation for Advanced Internet Development
10.33.0.0/23 AS174 PSINET PSINet Inc.
10.33.8.0/24 AS174 PSINET PSINet Inc.
39.0.0.0/8 AS4554 EP0-BLK-ASNBLOCK-4 Exchange Point Blocks
AS Summary
13979 Number of ASes in routing system
5289 Number of ASes announcing only one prefix
1816 Largest number of prefixes announced by an AS
AS209 : ASN-QWEST Qwest
73220608 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').
--- 27Sep02 ---
ASnum NetsNow NetsAggr NetGain % Gain Description
Table 121705 87359 34346 28.2% All ASes
AS209 1816 1038 778 42.8% ASN-QWEST Qwest
AS3908 1124 621 503 44.8% SUPERNETASBLK SuperNet, Inc.
AS701 1786 1286 500 28.0% ALTERNET-AS UUNET
Technologies, Inc.
AS2548 1586 1123 463 29.2% ICIX-MD-AS Business Internet,
Inc.
AS7132 602 140 462 76.7% SBIS-AS Southwestern Bell
Internet Services
AS7018 1359 959 400 29.4% ATT-INTERNET4 AT&T WorldNet
Services
AS7843 711 341 370 52.0% ADELPHIA-AS Adelphia Corp.
AS1221 1304 938 366 28.1% ASN-TELSTRA Telstra Pty Ltd
AS4323 645 295 350 54.3% TW-COMM Time Warner
Communications, Inc.
AS852 756 458 298 39.4% ASN852 Telus Advanced
Communications
AS6197 382 97 285 74.6% BATI-ATL BellSouth Network
Solutions, Inc
AS7046 590 316 274 46.4% UUNET-CUSTOMER UUNET
Technologies, Inc.
AS18566 272 4 268 98.5% COVAD Covad Communications
AS174 593 330 263 44.4% PSINET PSINet Inc.
AS4151 279 32 247 88.5% USDA-1 USDA
AS4355 382 144 238 62.3% ERMS-EARTHLNK EARTHLINK, INC
AS1 672 442 230 34.2% GNTY-1 Genuity
AS6347 397 170 227 57.2% DIAMOND SAVVIS Communications
Corporation
AS4814 255 36 219 85.9% CHINANET-BEIJING-AP China
Telecom (Group)Beijing
Telecom CompanyBeijing China
AS705 408 198 210 51.5% ASN-ALTERNET UUNET
Technologies, Inc.
AS1580 210 11 199 94.8% HQ, 5th Signal Command
AS22927 215 20 195 90.7% AR-TEAR2-LACNIC TELEFONICA DE
ARGENTINA
AS690 517 324 193 37.3% NSFNET-T3-RT-AS Merit Network
Inc.
AS1239 1110 930 180 16.2% SprintLink Sprint
AS2386 421 243 178 42.3% INS-AS AT&T Data
Communications Services
AS3356 389 214 175 45.0% LEVEL3 Level 3 Communications,
LLC
AS6595 232 60 172 74.1% DODDSEUR DoD Education
Activity Network Assistance
Center
AS1791 184 21 163 88.6% SPRINTLINK3 Sprint Government
Systems Division
AS4134 302 139 163 54.0% ERX-CHINALINK Data
Communications Bureau
AS6327 180 20 160 88.9% SHAWFIBER Shaw Fiberlink
Limited
Total 19679 10950 8729 44.4% Top 30 total
Please see http://www.cidr-report.org for the full report