This report has been generated at Fri Jan 24 21:45:50 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
17-01-03 118250 85350
18-01-03 118505 84955
19-01-03 117957 85033
20-01-03 118153 85036
21-01-03 118131 85084
22-01-03 118226 85008
23-01-03 118178 85134
24-01-03 118201 85092
AS Summary
14428 Number of ASes in routing system
5654 Number of ASes announcing only one prefix
1592 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').
--- 24Jan03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description
Table 118323 85145 33178 28.0% All ASes
AS3908 1185 694 491 41.4% SUPERNETASBLK SuperNet, Inc.
AS18566 443 5 438 98.9% COVAD Covad Communications
AS701 1592 1180 412 25.9% ALTERNET-AS UUNET
Technologies, Inc.
AS7018 1437 1036 401 27.9% ATT-INTERNET4 AT&T WorldNet
Services
AS7843 592 250 342 57.8% ADELPHIA-AS Adelphia Corp.
AS4323 527 187 340 64.5% TW-COMM Time Warner
Communications, Inc.
AS6197 468 152 316 67.5% BATI-ATL BellSouth Network
Solutions, Inc
AS1221 1137 839 298 26.2% ASN-TELSTRA Telstra Pty Ltd
AS6347 372 85 287 77.2% DIAMOND SAVVIS Communications
Corporation
AS1239 962 679 283 29.4% SPRINTLINK Sprint
AS4355 408 133 275 67.4% ERMS-EARTHLNK EARTHLINK, INC
AS7046 556 282 274 49.3% UUNET-CUSTOMER UUNET
Technologies, Inc.
AS4151 329 58 271 82.4% USDA-1 USDA
AS22927 289 22 267 92.4% AR-TEAR2-LACNIC TELEFONICA DE
ARGENTINA
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
Telecom (Group)
AS705 429 186 243 56.6% ASN-ALTERNET UUNET
Technologies, Inc.
AS852 678 445 233 34.4% ASN852 Telus Advanced
Communications
AS1 656 434 222 33.8% GNTY-1 Genuity
AS6198 423 202 221 52.2% BATI-MIA BellSouth Network
Solutions, Inc
AS17676 227 28 199 87.7% GIGAINFRA XTAGE CORPORATION
AS22291 228 29 199 87.3% CHARTER-LA Charter
Communications
AS690 521 326 195 37.4% MERIT-AS-27 Merit Network Inc.
AS6140 317 125 192 60.6% IMPSAT-USA ImpSat
AS209 520 332 188 36.2% ASN-QWEST Qwest
AS4134 298 114 184 61.7% ERX-CHINALINK Data
Communications Bureau
AS2386 425 252 173 40.7% INS-AS AT&T Data
Communications Services
AS2048 260 89 171 65.8% LANET-1 State of Louisiana
AS6327 186 35 151 81.2% SHAWFIBER Shaw Fiberlink
Limited
AS17557 329 182 147 44.7% PKTELECOM-AS-AP Pakistan
Telecom
AS11492 299 157 142 47.5% CABLEONE CABLE ONE
Total 16354 8553 7801 47.7% Top 30 total
Please see http://www.cidr-report.org for the full report