This report has been generated at Fri Mar 14 21:45:21 2003 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 07-03-03 120289 86148 08-03-03 120272 86188 09-03-03 120197 86257 10-03-03 120223 86324 11-03-03 120475 86388 12-03-03 120508 86345 13-03-03 120478 86334 14-03-03 120659 86376 AS Summary 14740 Number of ASes in routing system 5812 Number of ASes announcing only one prefix 1562 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'). --- 14Mar03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 120741 86391 34350 28.4% All ASes AS3908 1097 537 560 51.0% SUPERNETASBLK SuperNet, Inc. AS18566 518 25 493 95.2% COVAD Covad Communications AS701 1562 1129 433 27.7% ALTERNET-AS UUNET Technologies, Inc. AS4151 535 109 426 79.6% USDA-1 USDA AS7843 600 217 383 63.8% ADELPHIA-AS Adelphia Corp. AS4323 555 173 382 68.8% TW-COMM Time Warner Communications, Inc. AS7018 1372 1021 351 25.6% ATT-INTERNET4 AT&T WorldNet Services AS6197 499 160 339 67.9% BATI-ATL BellSouth Network Solutions, Inc AS1221 1101 805 296 26.9% ASN-TELSTRA Telstra Pty Ltd AS1239 974 690 284 29.2% SPRINTLINK Sprint AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS4355 391 119 272 69.6% ERMS-EARTHLNK EARTHLINK, INC AS705 449 195 254 56.6% ASN-ALTERNET UUNET Technologies, Inc. AS6198 451 200 251 55.7% BATI-MIA BellSouth Network Solutions, Inc AS4814 264 15 249 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS1 656 431 225 34.3% GNTY-1 Genuity AS17676 230 27 203 88.3% GIGAINFRA XTAGE CORPORATION AS2386 480 280 200 41.7% INS-AS AT&T Data Communications Services AS6347 370 171 199 53.8% DIAMOND SAVVIS Communications Corporation AS22291 242 45 197 81.4% CHARTER-LA Charter Communications AS4134 309 115 194 62.8% CHINANET-BACKBONE No.31,Jin-rong Street AS690 503 313 190 37.8% MERIT-AS-27 Merit Network Inc. AS209 530 341 189 35.7% ASN-QWEST Qwest AS27364 258 84 174 67.4% ACS-INTERNET Armstrong Cable Services AS2048 258 87 171 66.3% LANET-1 State of Louisiana AS17557 370 212 158 42.7% PKTELECOM-AS-AP Pakistan Telecom AS6140 292 140 152 52.1% IMPSAT-USA ImpSat AS22773 184 33 151 82.1% CCINET-2 Cox Communications Inc. Atlanta AS6327 187 40 147 78.6% SHAWFIBER Shaw Fiberlink Limited AS7303 242 98 144 59.5% AR-TAST-LACNIC Telecom Argentina Stet-France Telecom S.A. Total 15774 7826 7948 50.4% 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@apops.net routing-wg@ripe.net afnog@afnog.org