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Geoff Huston

Comments to: cidr-reports@potaroo.net



IPv6 CIDR REPORT for 19 Mar 25

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Wed Mar 19 08:46:29 2025 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        12-03-25    220055      113072
        13-03-25    220254      113308
        14-03-25    220639      113407
        15-03-25    220726      113445
        16-03-25    221230      113502
        17-03-25    221165      112987
        18-03-25    221253      113088
        19-03-25    221423      113088

 

AS Summary


         34699  Number of ASes in routing system
         21320  Number of ASes announcing only one prefix
          5842  Largest number of prefixes announced by an AS
                AS9808 : CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
      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.

         --- 19Mar25 ---
        ASnum         NetsNow NetsAggr  NetGain   % Gain   Description

        Table          221502   113179   108323    48.9%   All ASes

        AS9808           5842      794     5048    86.4%   CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
        AS7552           3168      287     2881    90.9%   VIETEL-AS-AP Viettel Group, VN
        AS45609          3386      664     2722    80.4%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS16509          5496     3146     2350    42.8%   AMAZON-02, US
        AS18403          3585     1342     2243    62.6%   FPT-AS-AP FPT Telecom Company, VN
        AS39891          2022      126     1896    93.8%   ALJAWWALSTC-AS, SA
        AS11172          2168      347     1821    84.0%   Alestra, S. de R.L. de C.V., MX
        AS24547          1832       68     1764    96.3%   CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
        AS28573          1585      235     1350    85.2%   Claro NXT Telecomunicacoes Ltda, BR
        AS56041          1414      111     1303    92.1%   CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
        AS45271          1606      305     1301    81.0%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS22773          1293       50     1243    96.1%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS32098          1370      202     1168    85.3%   TRANSTELCO-INC, US
        AS56046          1217       55     1162    95.5%   CMNET-JIANGSU-AP China Mobile communications corporation, CN
        AS47331          1190       71     1119    94.0%   TTNET, TR
        AS56044          1225      108     1117    91.2%   CMNET-AS-LIAONING China Mobile communications corporation, CN
        AS62240          1192       95     1097    92.0%   CLOUVIDER Clouvider - Global ASN, GB
        AS26611          1127       78     1049    93.1%   COMUNICACION CELULAR S.A. COMCEL S.A., CO
        AS5416           1039        2     1037    99.8%   Internet Service Provider, BH
        AS4808           1171      140     1031    88.0%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS132884         1028        4     1024    99.6%   SUMMIT-BD Summit Communications Limited, BD
        AS12479          1593      638      955    59.9%   UNI2-AS, ES
        AS38266          1433      513      920    64.2%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS17853           739        6      733    99.2%   LGTELECOM-AS-KR LGTELECOM, KR
        AS8881            735       17      718    97.7%   VERSATEL, DE
        AS11664           924      238      686    74.2%   Techtel LMDS Comunicaciones Interactivas S.A., AR
        AS56167           648       14      634    97.8%   PTML-PK Plot No 181-186 Street, PK
        AS12025           623       38      585    93.9%   IMDC-AS12025, US
        AS4134            627       46      581    92.7%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS56047           722      147      575    79.6%   CMNET-HUNAN-AP China Mobile communications corporation, CN

        Total           52000     9887    42113    81.0%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            5842 AS9808  CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
            5496 AS16509 AMAZON-02, US
            3585 AS18403 FPT-AS-AP FPT Telecom Company, VN
            3386 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            3168 AS7552  VIETEL-AS-AP Viettel Group, VN
            2168 AS11172 Alestra, S. de R.L. de C.V., MX
            2022 AS39891 ALJAWWALSTC-AS, SA
            1832 AS24547 CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
            1787 AS13335 CLOUDFLARENET, US
            1606 AS45271 VIL-AS-AP Vodafone Idea Ltd, IN
            1593 AS12479 UNI2-AS, ES
            1585 AS28573 Claro NXT Telecomunicacoes Ltda, BR
            1570 AS36183 AKAMAI-AS, US
            1526 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            1433 AS38266 VIL-AS-AP Vodafone Idea Ltd, IN
            1414 AS56041 CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
            1370 AS32098 TRANSTELCO-INC, US
            1299 AS17072 TOTAL PLAY TELECOMUNICACIONES SA DE CV, MX
            1293 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1273 AS6167  CELLCO-PART, 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.