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Geoff Huston

Comments to: cidr-reports@potaroo.net


IPv6 CIDR REPORT for 5 Mar 21

Report Sections:

This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Fri Mar 5 15:45:45 2021 AEST.

Status Summary

Table History


        Date      Prefixes    CIDR Agg
        26-02-21    110411       60973
        27-02-21    110354       60994
        28-02-21    110368       60846
        01-03-21    110170       60927
        02-03-21    110285       60996
        03-03-21    110477       61138
        04-03-21    110505       61171
        05-03-21    110486       61171

 

AS Summary


         22024  Number of ASes in routing system
         13710  Number of ASes announcing only one prefix
          2889  Largest number of prefixes announced by an AS
                AS11172: Alestra, S. de R.L. de C.V., MX
      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. 

         --- 05Mar21 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table     111008    61309    49699    44.8%   All ASes

        AS11172     2889      119     2770    95.9%   Alestra, S. de R.L. de C.V., MX
        AS45609     2081      422     1659    79.7%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479     1490        4     1486    99.7%   UNI2-AS, ES
        AS17622     2112      647     1465    69.4%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS22773     1225        8     1217    99.3%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS7552      1161        4     1157    99.7%   VIETEL-AS-AP Viettel Group, VN
        AS45271     1369      228     1141    83.3%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS28573     1231      135     1096    89.0%   CLARO S.A., BR
        AS9808      1430      603      827    57.8%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS39891      791        9      782    98.9%   ALJAWWALSTC-AS, SA
        AS4808       826       92      734    88.9%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS32098      810      130      680    84.0%   TRANSTELCO-INC, US
        AS16509     1543      917      626    40.6%   AMAZON-02, US
        AS38266      803      227      576    71.7%   VODAFONE-IN Vodafone India Ltd., IN
        AS33363      690      135      555    80.4%   BHN-33363, US
        AS62240      561       22      539    96.1%   CLOUVIDER Clouvider - Global ASN, GB
        AS4134       523       39      484    92.5%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS20115      551      138      413    75.0%   CHARTER-20115, US
        AS17552      405       16      389    96.0%   TRUEONLINE-AS-AP True Online, TH
        AS13142      409       50      359    87.8%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS13361      573      251      322    56.2%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS30036      588      284      304    51.7%   MEDIACOM-ENTERPRISE-BUSINESS, US
        AS55303      482      197      285    59.1%   EAGLENET-AP 60 Market Square,P.O. Box 364, PH
        AS58952      273        2      271    99.3%   FRONTIIRCOLTD-MM Frontiir Co. Ltd, MM
        AS20940      695      425      270    38.8%   AKAMAI-ASN1, NL
        AS55430      295       27      268    90.8%   STARHUB-NGNBN Starhub Ltd, SG
        AS45899      279       16      263    94.3%   VNPT-AS-VN VNPT Corp, VN
        AS9605       287       30      257    89.5%   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      26888     5181    21707    80.7%   Top 30 total




        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            2889 AS11172 Alestra, S. de R.L. de C.V., MX
            2112 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            2081 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            1543 AS16509 AMAZON-02, US
            1490 AS12479 UNI2-AS, ES
            1430 AS9808  CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
            1369 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
            1231 AS28573 CLARO S.A., BR
            1225 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1161 AS7552  VIETEL-AS-AP Viettel Group, VN
             922 AS17623 CNCGROUP-SZ China Unicom Shenzen network, CN
             835 AS13335 CLOUDFLARENET, US
             826 AS4808  CHINA169-BJ China Unicom Beijing Province Network, CN
             810 AS32098 TRANSTELCO-INC, US
             803 AS38266 VODAFONE-IN Vodafone India Ltd., IN
             791 AS39891 ALJAWWALSTC-AS, SA
             695 AS20940 AKAMAI-ASN1, NL
             690 AS33363 BHN-33363, US
             588 AS30036 MEDIACOM-ENTERPRISE-BUSINESS, US
             573 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU

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.