This report has been generated at Sun Sep 29 06:32:47 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 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 87644 28-09-02 123673 89338 29-09-02 123685 89454 Possible Bogus Routes 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 13991 Number of ASes in routing system 5313 Number of ASes announcing only one prefix 1940 Largest number of prefixes announced by an AS AS174 : PSINET PSINet Inc. 73212416 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'). --- 29Sep02 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 123655 89454 34201 27.7% All ASes AS209 1818 1042 776 42.7% ASN-QWEST Qwest AS3908 1124 622 502 44.7% SUPERNETASBLK SuperNet, Inc. AS701 1786 1286 500 28.0% ALTERNET-AS UUNET Technologies, Inc. AS2548 1582 1119 463 29.3% ICIX-MD-AS Business Internet, Inc. AS7132 603 140 463 76.8% SBIS-AS Southwestern Bell Internet Services AS174 1940 1520 420 21.6% PSINET PSINet Inc. AS7018 1360 959 401 29.5% ATT-INTERNET4 AT&T WorldNet Services AS1221 1306 940 366 28.0% ASN-TELSTRA Telstra Pty Ltd AS4323 647 305 342 52.9% TW-COMM Time Warner Communications, Inc. AS7843 712 410 302 42.4% ADELPHIA-AS Adelphia Corp. AS852 758 458 300 39.6% ASN852 Telus Advanced Communications AS6197 383 97 286 74.7% BATI-ATL BellSouth Network Solutions, Inc AS7046 585 312 273 46.7% UUNET-CUSTOMER UUNET Technologies, Inc. AS18566 273 4 269 98.5% COVAD Covad Communications AS4151 279 32 247 88.5% USDA-1 USDA AS4355 383 145 238 62.1% ERMS-EARTHLNK EARTHLINK, INC AS1 669 447 222 33.2% GNTY-1 Genuity AS6347 393 173 220 56.0% DIAMOND SAVVIS Communications Corporation AS4814 255 37 218 85.5% CHINANET-BEIJING-AP China Telecom (Group)Beijing Telecom CompanyBeijing China AS705 409 199 210 51.3% ASN-ALTERNET UUNET Technologies, Inc. AS1239 849 652 197 23.2% SprintLink Sprint 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 68 182 72.8% DODDSEUR DoD Education Activity Network Assistance Center AS4134 302 122 180 59.6% ERX-CHINALINK Data Communications Bureau AS2386 421 243 178 42.3% INS-AS AT&T Data Communications Services AS3356 389 212 177 45.5% LEVEL3 Level 3 Communications, LLC AS1791 184 21 163 88.6% SPRINTLINK3 Sprint Government Systems Division AS6327 180 20 160 88.9% SHAWFIBER Shaw Fiberlink Limited AS376 337 184 153 45.4% RISQ-AS Reseau Interordinateurs Scientique Quebecois (RISQ) Total 20910 12114 8796 42.1% 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