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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 AS2.0 (APNIC), and was produced at Thu Jul 19 18:45:43 2018 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        12-07-18     54723       33953
        13-07-18     54746       33727
        14-07-18     54440       33798
        15-07-18     54518       33665
        16-07-18     54232       33909
        17-07-18     54626       33967
        18-07-18     54741       33935
        19-07-18     54797       33935

 

AS Summary


         15637  Number of ASes in routing system
         10495  Number of ASes announcing only one prefix
           984  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.

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

        Table      54830    33300    21530    39.3%   All ASes

        AS22773      984       11      973    98.9%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS12479      977        6      971    99.4%   UNI2-AS, ES
        AS28573      888      143      745    83.9%   CLARO S.A., BR
        AS32098      570        3      567    99.5%   TRANSTELCO-INC - Transtelco Inc, US
        AS45609      564       49      515    91.3%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS33363      495       46      449    90.7%   BHN-TAMPA - BRIGHT HOUSE NETWORKS, LLC, US
        AS45271      467       83      384    82.2%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS13489      363        5      358    98.6%   EPM Telecomunicaciones S.A. E.S.P., CO
        AS13361      548      193      355    64.8%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS16509      716      366      350    48.9%   AMAZON-02 - Amazon.com, Inc., US
        AS54113      639      301      338    52.9%   FASTLY - Fastly, US
        AS174        383      102      281    73.4%   COGENT-174 - Cogent Communications, US
        AS55430      290       20      270    93.1%   STARHUBINTERNET-AS-NGNBN Starhub Internet Pte Ltd, SG
        AS7552       263        1      262    99.6%   VIETEL-AS-AP Viettel Group, VN
        AS9605       272       13      259    95.2%   DOCOMO NTT DOCOMO, INC., JP
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS8151       303       52      251    82.8%   Uninet S.A. de C.V., MX
        AS20277      256        9      247    96.5%   OSP-EU-WEST-001, GB
        AS9808       238        2      236    99.2%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS54540      298      103      195    65.4%   INCERO - Incero LLC, US
        AS3651       221       36      185    83.7%   SPRINT-BB6 - Sprint, US
        AS10507      200       34      166    83.0%   SPCS - Sprint Personal Communications Systems, US
        AS18403      167        4      163    97.6%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS17621      172       13      159    92.4%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS17622      159       11      148    93.1%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS7497       153        7      146    95.4%   CSTNET-AS-AP Computer Network Information Center, CN
        AS30036      219       74      145    66.2%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS20057      158       28      130    82.3%   ATT-MOBILITY-LLC-AS20057 - AT&T Mobility LLC, US
        AS52257      183       53      130    71.0%   Telconet S.A, EC
        AS38266      152       26      126    82.9%   VODAFONE-IN Vodafone India Ltd., IN

        Total      11556     1795     9761    84.5%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
             984 AS22773 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
             977 AS12479 UNI2-AS, ES
             888 AS28573 CLARO S.A., BR
             716 AS16509 AMAZON-02 - Amazon.com, Inc., US
             639 AS54113 FASTLY - Fastly, US
             570 AS32098 TRANSTELCO-INC - Transtelco Inc, US
             564 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
             548 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
             495 AS33363 BHN-TAMPA - BRIGHT HOUSE NETWORKS, LLC, US
             470 AS20940 AKAMAI-ASN1, US
             467 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
             451 AS22394 CELLCO - Cellco Partnership DBA Verizon Wireless, US
             383 AS174   COGENT-174 - Cogent Communications, US
             363 AS13489 EPM Telecomunicaciones S.A. E.S.P., CO
             327 AS19551 INCAPSULA - Incapsula Inc, US
             303 AS8151  Uninet S.A. de C.V., MX
             298 AS54540 INCERO - Incero LLC, US
             290 AS55430 STARHUBINTERNET-AS-NGNBN Starhub Internet Pte Ltd, SG
             278 AS15133 EDGECAST - MCI Communications Services, Inc. d/b/a Verizon Business, US
             273 AS20473 AS-CHOOPA - Choopa, LLC, 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.