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Geoff Huston

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IPv6 CIDR REPORT for 24 Nov 20

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Tue Nov 24 05:45:45 2020 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        17-11-20    100898       57927
        18-11-20    100980       57988
        19-11-20    101057       57878
        20-11-20    101049       57922
        21-11-20    101104       57852
        22-11-20    100993       57895
        23-11-20    101008       58042
        24-11-20    101654       58042

 

AS Summary


         21085  Number of ASes in routing system
         13226  Number of ASes announcing only one prefix
          1938  Largest number of prefixes announced by an AS
                AS45609: BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
      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.

         --- 24Nov20 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table     101560    58122    43438    42.8%   All ASes

        AS11172     1832       52     1780    97.2%   Alestra, S. de R.L. de C.V., MX
        AS45609     1938      262     1676    86.5%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479     1478        4     1474    99.7%   UNI2-AS, ES
        AS22773     1207       63     1144    94.8%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS7552      1142        4     1138    99.6%   VIETEL-AS-AP Viettel Group, VN
        AS45271     1298      173     1125    86.7%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS28573     1192      132     1060    88.9%   CLARO S.A., BR
        AS39891      773        9      764    98.8%   ALJAWWALSTC-AS, SA
        AS32098      784       65      719    91.7%   TRANSTELCO-INC, US
        AS17622     1362      718      644    47.3%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS9808      1031      424      607    58.9%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS16509     1451      854      597    41.1%   AMAZON-02, US
        AS33363      681       91      590    86.6%   BHN-33363, US
        AS38266      688      227      461    67.0%   VODAFONE-IN Vodafone India Ltd., IN
        AS4134       503       51      452    89.9%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS62240      456       20      436    95.6%   CLOUVIDER Clouvider - Global ASN, GB
        AS17552      381       22      359    94.2%   TRUEONLINE-AS-AP True Online, TH
        AS13142      385       32      353    91.7%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS30036      574      225      349    60.8%   MEDIACOM-ENTERPRISE-BUSINESS, US
        AS20115      448      105      343    76.6%   CHARTER-20115, US
        AS13361      593      273      320    54.0%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS55303      473      197      276    58.4%   EAGLENET-AP 60 Market Square,P.O. Box 364, PH
        AS58952      273        1      272    99.6%   FRONTIIRCOLTD-MM Frontiir Co. Ltd, MM
        AS4538       367       96      271    73.8%   ERX-CERNET-BKB China Education and Research Network Center, CN
        AS55430      297       29      268    90.2%   STARHUB-NGNBN Starhub Ltd, SG
        AS9829       387      121      266    68.7%   BSNL-NIB National Internet Backbone, IN
        AS45899      281       20      261    92.9%   VNPT-AS-VN VNPT Corp, VN
        AS9605       275       18      257    93.5%   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

        Total      23066     4292    18774    81.4%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            1938 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            1832 AS11172 Alestra, S. de R.L. de C.V., MX
            1478 AS12479 UNI2-AS, ES
            1451 AS16509 AMAZON-02, US
            1362 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            1298 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
            1207 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1192 AS28573 CLARO S.A., BR
            1142 AS7552  VIETEL-AS-AP Viettel Group, VN
            1031 AS9808  CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
             809 AS13335 CLOUDFLARENET, US
             784 AS32098 TRANSTELCO-INC, US
             784 AS54113 FASTLY, US
             773 AS39891 ALJAWWALSTC-AS, SA
             688 AS38266 VODAFONE-IN Vodafone India Ltd., IN
             681 AS33363 BHN-33363, US
             669 AS20940 AKAMAI-ASN1, EU
             613 AS22394 CELLCO, US
             593 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
             574 AS30036 MEDIACOM-ENTERPRISE-BUSINESS, 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.