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The Cidr Report
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 at merit.edu
eof-list at ripe.net
apops at lists.apnic.net
routing-wg at ripe.net
afnog at afnog.org
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