This report has been generated at Fri Dec 20 21:48:05 2002 AEST. The report analyses the BGP Routing Table of an AS4637 (Reach) router and generates a report on aggregation potential within the table. Check http://www.cidr-report.org/as4637 for a current version of this report. Recent Table History Date Prefixes CIDR Agg 13-12-02 116860 84869 14-12-02 117040 84854 15-12-02 117512 84906 16-12-02 117508 84871 17-12-02 117485 84596 18-12-02 116531 84555 19-12-02 116615 84511 20-12-02 116819 84486 AS Summary 14204 Number of ASes in routing system 5600 Number of ASes announcing only one prefix 1622 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73048064 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'). --- 20Dec02 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 116934 84523 32411 27.7% All ASes AS3908 1167 685 482 41.3% SUPERNETASBLK SuperNet, Inc. AS701 1622 1205 417 25.7% ALTERNET-AS UUNET Technologies, Inc. AS7018 1425 1029 396 27.8% ATT-INTERNET4 AT&T WorldNet Services AS18566 393 5 388 98.7% COVAD Covad Communications AS7843 624 279 345 55.3% ADELPHIA-AS Adelphia Corp. AS4323 530 187 343 64.7% TW-COMM Time Warner Communications, Inc. AS1221 1152 835 317 27.5% ASN-TELSTRA Telstra Pty Ltd AS6197 453 149 304 67.1% BATI-ATL BellSouth Network Solutions, Inc AS6347 359 85 274 76.3% DIAMOND SAVVIS Communications Corporation AS1239 948 676 272 28.7% SPRINTLINK Sprint AS4355 403 132 271 67.2% ERMS-EARTHLNK EARTHLINK, INC AS22927 289 22 267 92.4% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS7046 579 313 266 45.9% UUNET-CUSTOMER UUNET Technologies, Inc. AS705 431 192 239 55.5% ASN-ALTERNET UUNET Technologies, Inc. AS4814 249 15 234 94.0% CHINANET-BEIJING-AP China Telecom (Group) AS1 664 441 223 33.6% GNTY-1 Genuity AS6198 421 201 220 52.3% BATI-MIA BellSouth Network Solutions, Inc AS17676 230 29 201 87.4% GIGAINFRA XTAGE CORPORATION AS22291 226 29 197 87.2% CHARTER-LA Charter Communications AS690 513 319 194 37.8% MERIT-AS-27 Merit Network Inc. AS6140 314 121 193 61.5% IMPSAT-USA ImpSat AS4134 293 106 187 63.8% ERX-CHINALINK Data Communications Bureau AS4151 323 141 182 56.3% USDA-1 USDA AS209 519 338 181 34.9% ASN-QWEST Qwest AS852 622 442 180 28.9% ASN852 Telus Advanced Communications AS2048 262 88 174 66.4% LANET-1 State of Louisiana AS6327 184 33 151 82.1% SHAWFIBER Shaw Fiberlink Limited AS2386 370 225 145 39.2% INS-AS AT&T Data Communications Services AS17557 315 173 142 45.1% PKTELECOM-AS-AP Pakistan Telecom AS2686 225 87 138 61.3% AS2686 AT&T Global Network Services - EMEA Total 16105 8582 7523 46.7% 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