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