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Geoff Huston

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IPv6 CIDR REPORT for 19 Jul 18

Report Sections:


This report is generated from an analysis of the BGP routing table within AS6447 (RouteViews), and was produced at Thu Jul 19 18:19:55 2018 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        12-07-18     59591       36638
        13-07-18     59715       36656
        14-07-18     59594       36674
        15-07-18     59619       36296
        16-07-18     59317       36486
        17-07-18     59758       36666
        18-07-18     59955       36488
        19-07-18     59873       36566

 

AS Summary


         15787  Number of ASes in routing system
         10458  Number of ASes announcing only one prefix
          1847  Largest number of prefixes announced by an AS
                AS7552 : VIETEL-AS-AP Viettel Group, VN
      288230487829970944 (/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.

         --- 19Jul18 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      59874    36594    23280    38.9%   All ASes

        AS7552      1847      239     1608    87.1%   VIETEL-AS-AP Viettel Group, VN
        AS22773      985       11      974    98.9%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS12479      977       42      935    95.7%   UNI2-AS, ES
        AS45609     1217      295      922    75.8%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS28573      899      155      744    82.8%   CLARO S.A., BR
        AS33363      495       50      445    89.9%   BHN-TAMPA - BRIGHT HOUSE NETWORKS, LLC, US
        AS32098      853      480      373    43.7%   TRANSTELCO-INC - Transtelco Inc, US
        AS45271      467      100      367    78.6%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS16509      740      382      358    48.4%   AMAZON-02 - Amazon.com, Inc., US
        AS13489      362        5      357    98.6%   EPM Telecomunicaciones S.A. E.S.P., CO
        AS174        627      294      333    53.1%   COGENT-174 - Cogent Communications, US
        AS54113      630      300      330    52.4%   FASTLY - Fastly, US
        AS13361      531      221      310    58.4%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS55430      290       30      260    89.7%   STARHUBINTERNET-AS-NGNBN Starhub Internet Pte Ltd, SG
        AS9605       272       13      259    95.2%   DOCOMO NTT DOCOMO, INC., JP
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS20277      256        9      247    96.5%   OSP-EU-WEST-001, GB
        AS8151       303       74      229    75.6%   Uninet S.A. de C.V., MX
        AS9808       238       19      219    92.0%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS18403      208        4      204    98.1%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS54540      298      103      195    65.4%   INCERO - Incero LLC, US
        AS16625      199        9      190    95.5%   AKAMAI-AS - Akamai Technologies, Inc., US
        AS3651       221       39      182    82.4%   SPRINT-BB6 - Sprint, US
        AS10507      200       42      158    79.0%   SPCS - Sprint Personal Communications Systems, US
        AS17621      170       13      157    92.4%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS7497       153        3      150    98.0%   CSTNET-AS-AP Computer Network Information Center, CN
        AS17622      159       11      148    93.1%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS22394      497      358      139    28.0%   CELLCO - Cellco Partnership DBA Verizon Wireless, US
        AS21928      143        7      136    95.1%   T-MOBILE-AS21928 - T-Mobile USA, Inc., US
        AS30036      219       85      134    61.2%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US

        Total      14714     3394    11320    76.9%   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.