This report has been generated at Fri Jan 31 21:45:39 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 24-01-03 118201 85103 25-01-03 118189 83778 26-01-03 116341 84709 27-01-03 117892 84848 28-01-03 118004 85138 29-01-03 118290 85119 30-01-03 118378 85040 31-01-03 118463 85056 AS Summary 14479 Number of ASes in routing system 5680 Number of ASes announcing only one prefix 1585 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73080832 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'). --- 31Jan03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 118597 85097 33500 28.2% All ASes AS3908 1179 682 497 42.2% SUPERNETASBLK SuperNet, Inc. AS18566 450 7 443 98.4% COVAD Covad Communications AS701 1585 1174 411 25.9% ALTERNET-AS UUNET Technologies, Inc. AS7018 1427 1035 392 27.5% ATT-INTERNET4 AT&T WorldNet Services AS4323 527 170 357 67.7% TW-COMM Time Warner Communications, Inc. AS7843 584 257 327 56.0% ADELPHIA-AS Adelphia Corp. AS6197 471 154 317 67.3% BATI-ATL BellSouth Network Solutions, Inc AS1221 1136 830 306 26.9% ASN-TELSTRA Telstra Pty Ltd AS6347 376 85 291 77.4% DIAMOND SAVVIS Communications Corporation AS4355 410 126 284 69.3% ERMS-EARTHLNK EARTHLINK, INC AS1239 958 675 283 29.5% SPRINTLINK Sprint AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS7046 551 277 274 49.7% UUNET-CUSTOMER UUNET Technologies, Inc. AS4151 329 58 271 82.4% USDA-1 USDA AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS705 435 190 245 56.3% ASN-ALTERNET UUNET Technologies, Inc. AS852 680 445 235 34.6% ASN852 Telus Advanced Communications AS1 663 435 228 34.4% GNTY-1 Genuity AS6198 424 202 222 52.4% BATI-MIA BellSouth Network Solutions, Inc AS22291 237 30 207 87.3% CHARTER-LA Charter Communications AS17676 220 24 196 89.1% GIGAINFRA XTAGE CORPORATION AS690 505 311 194 38.4% MERIT-AS-27 Merit Network Inc. AS209 521 333 188 36.1% ASN-QWEST Qwest AS4134 301 117 184 61.1% ERX-CHINALINK Data Communications Bureau AS2386 435 258 177 40.7% INS-AS AT&T Data Communications Services AS6140 306 132 174 56.9% IMPSAT-USA ImpSat AS2048 259 87 172 66.4% LANET-1 State of Louisiana AS6327 187 36 151 80.7% SHAWFIBER Shaw Fiberlink Limited AS17557 330 183 147 44.5% PKTELECOM-AS-AP Pakistan Telecom AS11492 300 157 143 47.7% CABLEONE CABLE ONE Total 16342 8499 7843 48.0% 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