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 ------------------------------------ Copies of this report are mailed to: nanog@merit.edu eof-list@ripe.net apops@lists.apnic.net routing-wg@ripe.net afnog@afnog.org