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Geoff Huston

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IPv6 CIDR REPORT for 24 May 18

Report Sections:


This report is generated from an analysis of the BGP routing table within AS6447 (RouteViews), and was produced at Thu May 24 21:15:08 2018 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        17-05-18     55011       34431
        18-05-18     54989       34064
        19-05-18     54844       33792
        20-05-18     54788       33845
        21-05-18     54808       34777
        22-05-18     54791       35098
        23-05-18     54870       34898
        24-05-18     54949       34850

 

AS Summary


         15428  Number of ASes in routing system
         10252  Number of ASes announcing only one prefix
          1250  Largest number of prefixes announced by an AS
                AS22773: ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
      36318243520512 (/18.95) Largest address span announced by an AS (/64s)
                AS7922 : COMCAST-7922 - Comcast Cable Communications, LLC, 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.

         --- 24May18 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      55606    35408    20198    36.3%   All ASes

        AS22773     1250       45     1205    96.4%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS45609     1190      292      898    75.5%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479      869      207      662    76.2%   UNI2-AS, ES
        AS28573      899      265      634    70.5%   CLARO S.A., BR
        AS32098      835      450      385    46.1%   TRANSTELCO-INC - Transtelco Inc, US
        AS16509      683      334      349    51.1%   AMAZON-02 - Amazon.com, Inc., US
        AS54113      640      292      348    54.4%   FASTLY - Fastly, US
        AS174        619      285      334    54.0%   COGENT-174 - Cogent Communications, US
        AS33363      362       36      326    90.1%   BHN-TAMPA - BRIGHT HOUSE NETWORKS, LLC, US
        AS13489      327        6      321    98.2%   EPM Telecomunicaciones S.A. E.S.P., CO
        AS13361      486      204      282    58.0%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS55430      290       30      260    89.7%   STARHUBINTERNET-AS-NGNBN Starhub Internet Pte Ltd, SG
        AS9605       268        9      259    96.6%   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
        AS45271      343      100      243    70.8%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS8151       286       58      228    79.7%   Uninet S.A. de C.V., MX
        AS54540      298       98      200    67.1%   INCERO - Incero LLC, US
        AS16625      199        9      190    95.5%   AKAMAI-AS - Akamai Technologies, Inc., US
        AS3651       221       36      185    83.7%   SPRINT-BB6 - Sprint, US
        AS18403      210       45      165    78.6%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS17621      156        6      150    96.2%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS10507      200       51      149    74.5%   SPCS - Sprint Personal Communications Systems, US
        AS17622      159       11      148    93.1%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS30036      219       73      146    66.7%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS7552       235       95      140    59.6%   VIETEL-AS-AP Viettel Group, VN
        AS22394      498      358      140    28.1%   CELLCO - Cellco Partnership DBA Verizon Wireless, US
        AS20057      158       28      130    82.3%   ATT-MOBILITY-LLC-AS20057 - AT&T Mobility LLC, US
        AS19551      350      222      128    36.6%   INCAPSULA - Incapsula Inc, US
        AS52257      147       44      103    70.1%   Telconet S.A, EC

        Total      12911     3699     9212    71.4%   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.