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Geoff Huston

Comments to: cidr-reports@potaroo.net



IPv6 CIDR REPORT for 3 Dec 21

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Fri Dec 3 09:46:15 2021 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        26-11-21    149450       75513
        27-11-21    149476       76079
        28-11-21    148833       76262
        29-11-21    149491       76378
        30-11-21    149674       75668
        01-12-21    149423       77060
        02-12-21    149371       75260
        03-12-21    149557       75260

 

AS Summary


         27970  Number of ASes in routing system
         18548  Number of ASes announcing only one prefix
          4175  Largest number of prefixes announced by an AS
                AS53356: FREE RANGE CLOUD, CA
      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.

         --- 03Dec21 ---
        ASnum         NetsNow NetsAggr  NetGain   % Gain   Description

        Table          149742    75187    74555    49.8%   All ASes

        AS53356          4175       81     4094    98.1%   FREE RANGE CLOUD, CA
        AS11172          3488      125     3363    96.4%   Alestra, S. de R.L. de C.V., MX
        AS9808           2973      453     2520    84.8%   CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
        AS36492          2605      164     2441    93.7%   GOOGLEWIFI, US
        AS7552           2008        5     2003    99.8%   VIETEL-AS-AP Viettel Group, VN
        AS45609          2263      303     1960    86.6%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479          1602        4     1598    99.8%   UNI2-AS, ES
        AS17622          2425      915     1510    62.3%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS24547          1504       19     1485    98.7%   CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
        AS45271          1560      173     1387    88.9%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS22773          1265       13     1252    99.0%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS28573          1313      152     1161    88.4%   CLARO S.A., BR
        AS56046          1057       10     1047    99.1%   CMNET-JIANGSU-AP China Mobile communications corporation, CN
        AS62240          1001       28      973    97.2%   CLOUVIDER Clouvider - Global ASN, GB
        AS56044           966       14      952    98.6%   CMNET-AS-LIAONING China Mobile communications corporation, CN
        AS32098          1019      172      847    83.1%   TRANSTELCO-INC, US
        AS17623          1431      606      825    57.7%   CNCGROUP-SZ China Unicom Shenzen network, CN
        AS39891           800        9      791    98.9%   ALJAWWALSTC-AS, SA
        AS4808            899      127      772    85.9%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS16509          1878     1123      755    40.2%   AMAZON-02, US
        AS18403           916      191      725    79.1%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS38266           944      259      685    72.6%   VODAFONE-IN Vodafone India Ltd., IN
        AS56047           631       42      589    93.3%   CMNET-HUNAN-AP China Mobile communications corporation, CN
        AS4134            542       39      503    92.8%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS133612          694      209      485    69.9%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS20115           582      111      471    80.9%   CHARTER-20115, US
        AS30036           626      165      461    73.6%   MEDIACOM-ENTERPRISE-BUSINESS, US
        AS11664           434        5      429    98.8%   Techtel LMDS Comunicaciones Interactivas S.A., AR
        AS8376            481       65      416    86.5%   Jordan Data Communications, JO
        AS131429          482       66      416    86.3%   MOBIFONE-AS-VN MOBIFONE Corporation, VN

        Total           42564     5648    36916    86.7%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            4175 AS53356 FREE RANGE CLOUD, CA
            3488 AS11172 Alestra, S. de R.L. de C.V., MX
            2973 AS9808  CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
            2605 AS36492 GOOGLEWIFI, US
            2425 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            2263 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            2008 AS7552  VIETEL-AS-AP Viettel Group, VN
            1878 AS16509 AMAZON-02, US
            1602 AS12479 UNI2-AS, ES
            1560 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
            1504 AS24547 CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
            1431 AS17623 CNCGROUP-SZ China Unicom Shenzen network, CN
            1313 AS28573 CLARO S.A., BR
            1265 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1261 AS36183 AKAMAI-AS, US
            1057 AS56046 CMNET-JIANGSU-AP China Mobile communications corporation, CN
            1019 AS32098 TRANSTELCO-INC, US
            1001 AS62240 CLOUVIDER Clouvider - Global ASN, GB
             966 AS56044 CMNET-AS-LIAONING China Mobile communications corporation, CN
             944 AS38266 VODAFONE-IN Vodafone India Ltd., IN


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.