The Cidr Report

This report has been generated at Fri Apr 11 21:46:50 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
        04-04-03 121205 86530
        05-04-03 121077 86591
        06-04-03 120820 86365
        07-04-03 120917 86463
        08-04-03 121020 86473
        09-04-03 121144 86561
        10-04-03 120942 86620
        11-04-03 121008 86701

AS Summary
         14913 Number of ASes in routing system
          5884 Number of ASes announcing only one prefix
          1564 Largest number of prefixes announced by an AS
                AS701 : ALTERNET-AS UUNET Technologies, Inc.
      73154560 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').

--- 11Apr03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 121213 86696 34517 28.5% All ASes

AS4151 691 75 616 89.1% USDA-1 USDA
AS7843 642 188 454 70.7% ADELPHIA-AS Adelphia Corp.
AS701 1564 1111 453 29.0% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS4323 567 167 400 70.5% TW-COMM Time Warner
                                               Communications, Inc.
AS7132 802 414 388 48.4% SBIS-AS SBC Internet Services
                                               - Southwest
AS3908 911 529 382 41.9% SUPERNETASBLK SuperNet, Inc.
AS7018 1351 976 375 27.8% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS1221 1107 797 310 28.0% ASN-TELSTRA Telstra Pty Ltd
AS1239 965 682 283 29.3% SPRINTLINK Sprint
AS6198 457 181 276 60.4% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS6197 476 202 274 57.6% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS705 487 215 272 55.9% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS22927 286 14 272 95.1% AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS4355 373 115 258 69.2% ERMS-EARTHLNK EARTHLINK, INC
AS4814 270 16 254 94.1% CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS17557 378 144 234 61.9% PKTELECOM-AS-AP Pakistan
                                               Telecom
AS209 529 303 226 42.7% ASN-QWEST Qwest
AS2386 507 282 225 44.4% INS-AS AT&T Data
                                               Communications Services
AS17676 237 29 208 87.8% GIGAINFRA XTAGE CORPORATION
AS27364 266 59 207 77.8% ACS-INTERNET Armstrong Cable
                                               Services
AS11305 341 143 198 58.1% INTERLAND-NET1 Interland
                                               Incorporated
AS22773 203 8 195 96.1% CCINET-2 Cox Communications
                                               Inc. Atlanta
AS690 495 316 179 36.2% MERIT-AS-27 Merit Network Inc.
AS3561 513 335 178 34.7% CWUSA Cable & Wireless USA
AS6347 367 190 177 48.2% DIAMOND SAVVIS Communications
                                               Corporation
AS2048 254 84 170 66.9% LANET-1 State of Louisiana
AS22291 241 79 162 67.2% CHARTER-LA Charter
                                               Communications
AS6327 190 34 156 82.1% SHAWFIBER Shaw Fiberlink
                                               Limited
AS7303 242 93 149 61.6% AR-TAST-LACNIC Telecom
                                               Argentina Stet-France Telecom
                                               S.A.
AS3215 321 175 146 45.5% AS3215 France Telecom
                                               Transpac

Total 16033 7956 8077 50.4% Top 30 total

Please see http://www.cidr-report.org for the full report