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Geoff Huston

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IPv6 CIDR REPORT for 20 Sep 20

Report Sections:


This report is generated from an analysis of the BGP routing table withinRouteViews, and was produced at Sun Sep 20 01:05:09 2020 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        13-09-20     96232       54104
        14-09-20     96266       54154
        15-09-20     96519       54535
        16-09-20     96734       54849
        17-09-20     96970       55137
        18-09-20     96774       55399
        19-09-20     96825       55038
        20-09-20     96689       55077

 

AS Summary


         20800  Number of ASes in routing system
         12954  Number of ASes announcing only one prefix
          2531  Largest number of prefixes announced by an AS
                AS11172: Alestra, S. de R.L. de C.V., MX
      36318243520512 (/18.95) Largest address span announced by an AS (/64s)
                AS7922 : COMCAST-7922, US


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.

         --- 20Sep20 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      96689    55077    41612    43.0%   All ASes

        AS11172     2531      126     2405    95.0%   Alestra, S. de R.L. de C.V., MX
        AS45609     1837      219     1618    88.1%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479     1453      246     1207    83.1%   UNI2-AS, ES
        AS22773     1195       18     1177    98.5%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS28573     1328      207     1121    84.4%   CLARO S.A., BR
        AS45271     1235      162     1073    86.9%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS7552       975        6      969    99.4%   VIETEL-AS-AP Viettel Group, VN
        AS33363      667       50      617    92.5%   BHN-33363, US
        AS39891      692       89      603    87.1%   ALJAWWALSTC-AS, SA
        AS62240      555       30      525    94.6%   CLOUVIDER Clouvider - Global ASN, GB
        AS4134       503       31      472    93.8%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS9808       464        8      456    98.3%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS30036      564      115      449    79.6%   MEDIACOM-ENTERPRISE-BUSINESS, US
        AS16509     1288      853      435    33.8%   AMAZON-02, US
        AS38266      607      186      421    69.4%   VODAFONE-IN Vodafone India Ltd., IN
        AS17622     1016      622      394    38.8%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS20115      440       84      356    80.9%   CHARTER-20115, US
        AS13142      382       34      348    91.1%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS17552      381       68      313    82.2%   TRUE-AS-AP True Internet Co.,Ltd., TH
        AS32098      771      473      298    38.7%   TRANSTELCO-INC, US
        AS13361      387       90      297    76.7%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS9829       418      137      281    67.2%   BSNL-NIB National Internet Backbone, IN
        AS55430      297       27      270    90.9%   STARHUB-NGNBN Starhub Ltd, SG
        AS9605       271       13      258    95.2%   DOCOMO NTT DOCOMO, INC., JP
        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
        AS45899      272       17      255    93.8%   VNPT-AS-VN VNPT Corp, VN
        AS17621      258       23      235    91.1%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS55303      301       67      234    77.7%   EAGLENET-AP 60 Market Square,P.O. Box 364, PH
        AS3462       234        4      230    98.3%   HINET Data Communication Business Group, TW

        Total      21838     4009    17829    81.6%   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.