This report has been generated at Fri Mar 28 21:50:09 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
21-03-03 120815 86434
22-03-03 120741 86424
23-03-03 120589 86556
24-03-03 120679 86593
25-03-03 120712 86324
26-03-03 120739 86276
27-03-03 120877 86281
28-03-03 120855 86349
AS Summary
14836 Number of ASes in routing system
5851 Number of ASes announcing only one prefix
1555 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').
--- 28Mar03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description
Table 121000 86362 34638 28.6% All ASes
AS3908 1048 537 511 48.8% SUPERNETASBLK SuperNet, Inc.
AS18566 509 14 495 97.2% COVAD Covad Communications
AS4151 585 107 478 81.7% USDA-1 USDA
AS701 1555 1115 440 28.3% ALTERNET-AS UUNET
Technologies, Inc.
AS7843 599 198 401 66.9% ADELPHIA-AS Adelphia Corp.
AS7018 1346 952 394 29.3% ATT-INTERNET4 AT&T WorldNet
Services
AS4323 561 176 385 68.6% TW-COMM Time Warner
Communications, Inc.
AS1221 1109 813 296 26.7% ASN-TELSTRA Telstra Pty Ltd
AS1239 968 688 280 28.9% SPRINTLINK Sprint
AS6197 476 202 274 57.6% BATI-ATL BellSouth Network
Solutions, Inc
AS22927 286 14 272 95.1% AR-TEAR2-LACNIC TELEFONICA DE
ARGENTINA
AS6198 450 182 268 59.6% BATI-MIA BellSouth Network
Solutions, Inc
AS705 534 268 266 49.8% ASN-ALTERNET UUNET
Technologies, Inc.
AS4355 382 116 266 69.6% ERMS-EARTHLNK EARTHLINK, INC
AS1 685 429 256 37.4% GNTY-1 Genuity
AS4814 267 15 252 94.4% CHINANET-BEIJING-AP China
Telecom (Group)
AS2386 499 249 250 50.1% INS-AS AT&T Data
Communications Services
AS17676 235 28 207 88.1% GIGAINFRA XTAGE CORPORATION
AS22291 239 39 200 83.7% CHARTER-LA Charter
Communications
AS27364 265 65 200 75.5% ACS-INTERNET Armstrong Cable
Services
AS7132 674 475 199 29.5% SBIS-AS SBC Internet Services
- Southwest
AS4134 316 123 193 61.1% CHINANET-BACKBONE
No.31,Jin-rong Street
AS22773 197 8 189 95.9% CCINET-2 Cox Communications
Inc. Atlanta
AS209 526 339 187 35.6% ASN-QWEST Qwest
AS690 503 316 187 37.2% MERIT-AS-27 Merit Network Inc.
AS6347 373 193 180 48.3% DIAMOND SAVVIS Communications
Corporation
AS3561 520 344 176 33.8% CWUSA Cable & Wireless USA
AS2048 259 87 172 66.4% LANET-1 State of Louisiana
AS17557 375 214 161 42.9% PKTELECOM-AS-AP Pakistan
Telecom
AS6140 290 140 150 51.7% IMPSAT-USA ImpSat
Total 16631 8446 8185 49.2% Top 30 total
Please see http://www.cidr-report.org for the full report