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Geoff Huston

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IPv6 CIDR REPORT for 24 Mar 19

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Sun Mar 24 18:45:44 2019 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        17-03-19     65837       38571
        18-03-19     65818       38586
        19-03-19     65886       38677
        20-03-19     65978       38861
        21-03-19     66069       38847
        22-03-19     66159       38980
        23-03-19     66216       39012
        24-03-19     66201       39012

 

AS Summary


         16866  Number of ASes in routing system
         11026  Number of ASes announcing only one prefix
          1453  Largest number of prefixes announced by an AS
                AS12479: UNI2-AS, ES
      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.

         --- 24Mar19 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      66247    39028    27219    41.1%   All ASes

        AS12479     1453        6     1447    99.6%   UNI2-AS, ES
        AS22773      988       15      973    98.5%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS28573      969      129      840    86.7%   CLARO S.A., BR
        AS11172      702       36      666    94.9%   Alestra, S. de R.L. de C.V., MX
        AS32098      644       24      620    96.3%   TRANSTELCO-INC - Transtelco Inc, US
        AS45609      711      120      591    83.1%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS33363      657       67      590    89.8%   BHN-33363 - Charter Communications, Inc, US
        AS7552       684      127      557    81.4%   VIETEL-AS-AP Viettel Group, VN
        AS30036      728      218      510    70.1%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS45271      562      142      420    74.7%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS13361      572      195      377    65.9%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS9829       444       90      354    79.7%   BSNL-NIB National Internet Backbone, IN
        AS17622      493      139      354    71.8%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS16509      769      417      352    45.8%   AMAZON-02 - Amazon.com, Inc., US
        AS9808       345       29      316    91.6%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS13142      333       21      312    93.7%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS174        415      114      301    72.5%   COGENT-174 - Cogent Communications, US
        AS3462       266        4      262    98.5%   HINET Data Communication Business Group, TW
        AS9605       272       13      259    95.2%   DOCOMO NTT DOCOMO, INC., JP
        AS24173      258        1      257    99.6%   NETNAM-AS-AP Netnam Company, VN
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS55430      283       34      249    88.0%   STARHUB-NGNBN Starhub Ltd, SG
        AS4808       229       23      206    90.0%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS54113      579      392      187    32.3%   FASTLY - Fastly, US
        AS3651       209       34      175    83.7%   SPRINT-BB6 - Sprint, US
        AS21003      182       13      169    92.9%   PINKU-DAIMARI Pinku Daimari | CHD-IX, GB
        AS10507      200       34      166    83.0%   SPCS - Sprint Personal Communications Systems, US
        AS18403      162        6      156    96.3%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS7497       160        6      154    96.2%   CSTNET-AS-AP Computer Network Information Center, CN
        AS17552      180       27      153    85.0%   TRUE-AS-AP True Internet Co.,Ltd., TH

        Total      14707     2477    12230    83.2%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            1453 AS12479 UNI2-AS, ES
             988 AS22773 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
             969 AS28573 CLARO S.A., BR
             769 AS16509 AMAZON-02 - Amazon.com, Inc., US
             728 AS30036 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
             711 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
             702 AS11172 Alestra, S. de R.L. de C.V., MX
             684 AS7552  VIETEL-AS-AP Viettel Group, VN
             663 AS13335 CLOUDFLARENET - Cloudflare, Inc., US
             657 AS33363 BHN-33363 - Charter Communications, Inc, US
             644 AS32098 TRANSTELCO-INC - Transtelco Inc, US
             579 AS54113 FASTLY - Fastly, US
             572 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
             565 AS22394 CELLCO - Cellco Partnership DBA Verizon Wireless, US
             562 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
             517 AS20940 AKAMAI-ASN1, US
             493 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
             444 AS9829  BSNL-NIB National Internet Backbone, IN
             415 AS174   COGENT-174 - Cogent Communications, US
             374 AS19551 INCAPSULA - Incapsula Inc, US


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.