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Geoff Huston

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IPv6 CIDR REPORT for 21 Nov 19

Report Sections:


This report is generated from an analysis of the BGP routing table withinRouteViews, and was produced at Thu Nov 21 05:15:15 2019 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        14-11-19     79741       45228
        15-11-19     79708       46723
        16-11-19     79747       45680
        17-11-19     79649       46547
        18-11-19     79898       45653
        19-11-19     79491       46559
        20-11-19     79789       46683
        21-11-19     79651       46724

 

AS Summary


         18455  Number of ASes in routing system
         11685  Number of ASes announcing only one prefix
          1599  Largest number of prefixes announced by an AS
                AS11172: Alestra, S. de R.L. de C.V., MX
      288230638691614720 (/6.00) Largest address span announced by an AS (/64s)
                AS12552: IPO-EU, SE


Aggregation Summary


The algorithm used in this report proposes aggregation only when there is a precise match using AS path so as to preserve traffic transit policies.

         --- 21Nov19 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      79549    46659    32890    41.3%   All ASes

        AS11172     1599      556     1043    65.2%   Alestra, S. de R.L. de C.V., MX
        AS28573     1222      223      999    81.8%   CLARO S.A., BR
        AS22773     1000       18      982    98.2%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS45609     1063      147      916    86.2%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479     1318      503      815    61.8%   UNI2-AS, ES
        AS45271      924      166      758    82.0%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS7552       708        6      702    99.2%   VIETEL-AS-AP Viettel Group, VN
        AS8376      1166      553      613    52.6%   Jordan Data Communications, JO
        AS33363      658       54      604    91.8%   BHN-33363 - Charter Communications, Inc, US
        AS4134       502       30      472    94.0%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS13361      540      101      439    81.3%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS16509     1198      777      421    35.1%   AMAZON-02 - Amazon.com, Inc., US
        AS30036      537      117      420    78.2%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS17622      502       97      405    80.7%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS52300      509      180      329    64.6%   Internet Local, AR
        AS9808       375       68      307    81.9%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS174        621      340      281    45.2%   COGENT-174 - Cogent Communications, US
        AS55430      302       33      269    89.1%   STARHUB-NGNBN Starhub Ltd, SG
        AS55303      288       23      265    92.0%   EAGLENET-AP 60 Market Square,P.O. Box 364, PH
        AS3462       290       27      263    90.7%   HINET Data Communication Business Group, TW
        AS9605       271       13      258    95.2%   DOCOMO NTT DOCOMO, INC., JP
        AS9829       470      212      258    54.9%   BSNL-NIB National Internet Backbone, IN
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS24173      258        3      255    98.8%   NETNAM-AS-AP Netnam Company, VN
        AS32098      710      459      251    35.4%   TRANSTELCO-INC - Transtelco Inc, US
        AS17552      292       50      242    82.9%   TRUE-AS-AP True Internet Co.,Ltd., TH
        AS8151       358      131      227    63.4%   Uninet S.A. de C.V., MX
        AS54113      703      483      220    31.3%   FASTLY - Fastly, US
        AS4808       231       26      205    88.7%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS22394      737      532      205    27.8%   CELLCO - Cellco Partnership DBA Verizon Wireless, US

        Total      19610     5929    13681    69.8%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description


Last Week's Changes


This a daily snapshot of changes in routes being withdrawn and added. The deltas are calculated over a rolling 7 day period. Please bear in mind this is purely a "snapshot" and a large flucuation could be caused by a connectivity problem, for example.