This report has been generated at Fri Apr 4 21:45:29 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
29-03-03 121022 86344
30-03-03 121098 86444
30-03-03 121192 86322
31-03-03 121111 86222
01-04-03 121043 86425
02-04-03 121298 86692
03-04-03 121290 86674
04-04-03 121205 86508
AS Summary
14872 Number of ASes in routing system
5874 Number of ASes announcing only one prefix
1557 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').
--- 04Apr03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description
Table 121023 86497 34526 28.5% All ASes
AS4151 612 75 537 87.7% USDA-1 USDA
AS18566 516 12 504 97.7% COVAD Covad Communications
AS701 1557 1113 444 28.5% ALTERNET-AS UUNET
Technologies, Inc.
AS7843 621 189 432 69.6% ADELPHIA-AS Adelphia Corp.
AS3908 956 529 427 44.7% SUPERNETASBLK SuperNet, Inc.
AS7018 1349 958 391 29.0% ATT-INTERNET4 AT&T WorldNet
Services
AS4323 565 181 384 68.0% TW-COMM Time Warner
Communications, Inc.
AS7132 727 409 318 43.7% SBIS-AS SBC Internet Services
- Southwest
AS1221 1108 811 297 26.8% ASN-TELSTRA Telstra Pty Ltd
AS1239 960 679 281 29.3% SPRINTLINK Sprint
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
ARGENTINA
AS6198 460 185 275 59.8% BATI-MIA BellSouth Network
Solutions, Inc
AS6197 475 202 273 57.5% BATI-ATL BellSouth Network
Solutions, Inc
AS4355 380 110 270 71.1% ERMS-EARTHLNK EARTHLINK, INC
AS705 459 203 256 55.8% ALTERNET-AS UUNET
Technologies, Inc.
AS4814 269 15 254 94.4% CHINANET-BEIJING-AP China
Telecom (Group)
AS2386 499 277 222 44.5% INS-AS AT&T Data
Communications Services
AS17676 235 28 207 88.1% GIGAINFRA XTAGE CORPORATION
AS27364 266 65 201 75.6% ACS-INTERNET Armstrong Cable
Services
AS11305 340 146 194 57.1% INTERLAND-NET1 Interland
Incorporated
AS22773 202 8 194 96.0% CCINET-2 Cox Communications
Inc. Atlanta
AS209 523 337 186 35.6% ASN-QWEST Qwest
AS690 502 318 184 36.7% MERIT-AS-27 Merit Network Inc.
AS22291 240 60 180 75.0% CHARTER-LA Charter
Communications
AS3561 515 338 177 34.4% CWUSA Cable & Wireless USA
AS2048 258 87 171 66.3% LANET-1 State of Louisiana
AS6347 368 201 167 45.4% DIAMOND SAVVIS Communications
Corporation
AS1 639 483 156 24.4% GNTY-1 Genuity
AS6327 190 34 156 82.1% SHAWFIBER Shaw Fiberlink
Limited
AS6140 295 152 143 48.5% IMPSAT-USA ImpSat
Total 16381 8219 8162 49.8% Top 30 total
Please see http://www.cidr-report.org for the full report