The Cidr Report
This report has been generated at Fri Apr 18 21:33:51 2008 AEST.
The report analyses the BGP Routing Table of AS2.0 router
and generates a report on aggregation potential within the table.
Check http://www.cidr-report.org for a current version of this report.
Recent Table History
Date PrefixesCIDR Agg
11-04-08257025 161793
12-04-08257320 162375
13-04-08257308 162847
14-04-08257510 162672
15-04-08257503 164095
16-04-08257786 164155
17-04-08257824 164757
18-04-08257852 163801
AS Summary
28074 Number of ASes in routing system
11833 Number of ASes announcing only one prefix
1630 Largest number of prefixes announced by an AS
AS4755 : VSNL-AS Videsh Sanchar Nigam Ltd. Autonomous System
88503040 Largest address span announced by an AS (/32s)
AS721 : DISA-ASNBLK - DoD Network Information Center
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').
--- 18Apr08 ---
ASnumNetsNow NetsAggr NetGain % Gain Description
Table 258065 1642109385536.4% All ASes
AS4755 1630 201 142987.7% VSNL-AS Videsh Sanchar Nigam
Ltd. Autonomous System
AS6389 1420 244 117682.8% BELLSOUTH-NET-BLK -
BellSouth.net Inc.
AS9498 1161 66 109594.3% BBIL-AP BHARTI BT INTERNET
LTD.
AS18566 1043 34 100996.7% COVAD - Covad Communications
Co.
AS22773 917 85 83290.7% CCINET-2 - Cox Communications
Inc.
AS4323 1423 609 81457.2% TWTC - Time Warner Telecom,
Inc.
AS11492 1211 467 74461.4% CABLEONE - CABLE ONE
AS19262 899 225 67475.0% VZGNI-TRANSIT - Verizon
Internet Services Inc.
AS8151 1187 539 64854.6% Uninet S.A. de C.V.
AS17488 1013 385 62862.0% HATHWAY-NET-AP Hathway IP Over
Cable Internet
AS1785 1011 394 61761.0% AS-PAETEC-NET - PaeTec
Communications, Inc.
AS6478 911 367 54459.7% ATT-INTERNET3 - AT&T WorldNet
Services
AS2386 1394 874 52037.3% INS-AS - AT&T Data
Communications Services
AS18101 681 172 50974.7% RIL-IDC Reliance Infocom Ltd
Internet Data Centre,
AS6197 985 508 47748.4% BATI-ATL - BellSouth Network
Solutions, Inc
AS4766 852 392 46054.0% KIXS-AS-KR Korea Telecom
AS19916 555 99 45682.2% ASTRUM-0001 - OLM LLC
AS7011 1094 641 45341.4% FRONTIER-AND-CITIZENS -
Frontier Communications of
America, Inc.
AS4812 544 98 44682.0% CHINANET-SH-AP China Telecom
(Group)
AS855645 200 44569.0% CANET-ASN-4 - Bell Aliant
AS17676 508 68 44086.6% GIGAINFRA BB TECHNOLOGY Corp.
AS22047 558 138 42075.3% VTR BANDA ANCHA S.A.
AS8103 566 153 41373.0% STATE-OF-FLA - Florida
Department of Management
Services - Technology Program
AS7018 1428 1023 40528.4% ATT-INTERNET4 - AT&T WorldNet
Services
AS6140 609 217 39264.4% IMPSAT-USA - ImpSat USA, Inc.
AS9443 455 78 37782.9% INTERNETPRIMUS-AS-AP Primus
Telecommunications
AS3602 453 78 37582.8% AS3602-RTI - Rogers Telecom
Inc.
AS4808 517 154 36370.2% CHINA169-BJ CNCGROUP IP
network China169 Beijing
Province Network
AS5668 685 334 35151.2% AS-5668 - CenturyTel Internet
BGP Update Report
BGP Update Report Interval: 17-Mar-08 -to- 17-Apr-08 (32 days) Observation Point: BGP Peering with AS2.0 TOP 20 Unstable Origin AS Rank ASNUpds % Upds/PfxAS-Name 1 - AS949894221 1.4% 73.3 -- BBIL-AP BHARTI BT INTERNET LTD. 2 - AS24731 79959 1.2% 929.8 -- ASN-NESMA National Engineering Services and Marketing Company Ltd. (NESMA) 3 - AS958364652 1.0% 54.6 -- SIFY-AS-IN Sify Limited 4 - AS886657991 0.9% 191.4 -- BTC-AS Bulgarian Telecommunication Company Plc. 5 - AS912153147 0.8% 21.1 -- TTNET TTnet Autonomous System 6 - AS17974 49387 0.7% 109.5 -- TELKOMNET-AS2-AP PT Telekomunikasi Indonesia 7 - AS815145233 0.7% 27.7 -- Uninet S.A. de C.V. 8 - AS26829 43980 0.7% 43980.0 -- YKK-USA - YKK USA,INC 9 - AS18306 42440 0.6%1147.0 -- MASANHANANET-AS-KR HANANET 10 - AS238641792 0.6% 28.7 -- INS-AS - AT&T Data Communications Services 11 - AS919834239 0.5% 77.6 -- KAZTELECOM-AS Kazakhtelecom Corporate Sales Administration 12 - AS614033856 0.5% 49.6 -- IMPSAT-USA - ImpSat USA, Inc. 13 - AS773833643 0.5% 130.9 -- Telecomunicacoes da Bahia S.A. 14 - AS630631605 0.5% 672.4 -- Telcel, C.A 15 - AS24863 29916 0.5% 64.1 -- LINKdotNET-AS 16 - AS701828370 0.4% 18.4 -- ATT-INTERNET4 - AT&T WorldNet Services 17 - AS17487 26508 0.4% 26508.0 -- ICBCASIA-AP Industrial and Commercial Bank 18 - AS20115 26004 0.4% 20.8 -- CHARTER-NET-HKY-NC - Charter Communications 19 - AS982925944 0.4% 38.7 -- BSNL-NIB National Internet Backbone 20 - AS475525887 0.4% 15.8 -- VSNL-AS Videsh Sanchar Nigam Ltd. Autonomous System TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASNUpds % Upds/PfxAS-Name 1 - AS26829 43980 0.7% 43980.0 -- YKK-USA - YKK USA,INC 2 - AS17487 26508 0.4% 26508.0 -- ICBCASIA-AP Industrial and Commercial Bank 3 - AS19334 24548 0.4% 24548.0 -- SPORTLINE-DBC - SPORTLINE 4 - AS19017 15781 0.2% 15781.0 -- QUALCOMM-QWBS-LV - Qualcomm Wireless Business Solutions 5 - AS309299144 0.1%9144.0 -- HUTCB Hidrotechnical Faculty - Technical University 6 - AS42787 22009 0.3%7336.3 -- MMIP-AS MultiMedia IP Ltd. 7 - AS14895 18749 0.3%6249.7 -- LAWSON-SOFTWARE - Lawson Software 8 - AS134956135 0.1%6135.0 -- NTT do Brasil Telecomunicaoes Ltda 9 - AS151365672 0.1%5672.0 -- AS-NSPOF - NSPOF Communications Inc 10 - AS446565560 0.1%5560.0 -- HOLOSFIND-ROMANIA HOLOSFIND SRL 11 - AS212915185 0.1%5185.0 -- OMEGABANK 8 Dragatsaniou str 12 - AS7257 9437 0.1%4718.5 -- PREMIERE-GLOBAL-SERVICES-INC - Premiere Global Services, Inc. 13 - AS292253862 0.1%3862.0 -- TAIF-TELCOM-AS JSC TAIF-TELCOM 14 - AS250243279 0.1%3279.0 -- DECEUNINCK-PLASTICS Deceuninck Plastics Autonomous System 15 - AS391052867 0.0%2867.0 -- CLASS-AS SC Class Computers And Service SRL 16 - AS23082 12832 0.2%2566.4 -- MPHI - Michigan Public health Institute 17 - AS282822142 0.0%2142.0 -- DW7 CENTRO DE DADOS LTDA 18 - AS369752067 0.0%2067.0 -- CBA-AS 19 - AS158216050 0.1%2016.7 -- ASTRAL-AS JV "Astral-Kiev Ltd." Autonomous System 20 - AS974714436 0.2%1804.5 -- EZINTERNET-AS-AP EZInternet Pty Ltd TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 125.23.208.0/20 63640 0.9% AS9498 -- BBIL-AP BHARTI BT INTERNET LTD. 2 - 213.91.175.0/24 49863 0.7% AS8866 -- BTC-AS Bulgarian Telecommunication Company Plc. 3 - 12.108.254.0/24 43980 0.6% AS26829 -- YKK-USA - YKK USA,INC 4 - 220.241.83.0/24 26508 0.4% AS17487 -- ICBCASIA-AP Industrial and Commercial Bank 5 - 84.23.96.0/19 25412 0.4% AS24731 -- ASN-NESMA National Engineering Services and Marketing Company Ltd. (NESMA) AS34400 -- ASN-ETTIHADETISALAT Etihad Etisalat 6 - 64.79.128.0/1925194 0.4% AS23005 -- SWITCH-COMMUNICATIONS - SWITCH Communications Group LLC 7 - 63.169.11.0/2424548 0.3% AS19334 -- SPORTLINE-DBC - SPORTLINE 8 - 221.135.80.0/24 23563 0.3% AS9583 -- SIFY-AS-IN Sify Limited 9 - 193.33.184.0/23 21981 0.3% AS42787 -- MMIP-AS MultiMedia IP Ltd. 10 - 125.57.60.0/2421655 0.3% AS18306 -- MASANHANANET-AS-KR HANANET 11 - 124.7.192.0/2421390 0.3% AS9583 -- SIFY-AS-IN Sify Limited 12 - 211.175.148.0/24 19452 0.3% AS18306 -- MASANHANANET-AS-KR HANANET 13 - 221.128.192.0/18 17513 0.2% AS18231 -- EXATT-AS-AP Exatt Technologies Private Ltd. 14 - 63.82
