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Geoff Huston

Comments to: cidr-reports@potaroo.net



IPv6 CIDR REPORT for 1 Jul 25

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Tue Jul 1 18:46:38 2025 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        24-06-25    230060      116531
        25-06-25    230145      116725
        26-06-25    229990      116997
        27-06-25    230648      117115
        28-06-25    230854      117317
        29-06-25    231074      117300
        30-06-25    231035      117328
        01-07-25    230708      117328

 

AS Summary


         35028  Number of ASes in routing system
         21475  Number of ASes announcing only one prefix
          6682  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.

         --- 01Jul25 ---
        ASnum         NetsNow NetsAggr  NetGain   % Gain   Description

        Table          231511   117470   114041    49.3%   All ASes

        AS9808           6682      979     5703    85.3%   CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
        AS7552           3965        6     3959    99.8%   VIETEL-AS-AP Viettel Group, VN
        AS60539          2547       20     2527    99.2%   HUICAST_TELECOM, HK
        AS45609          3439     1079     2360    68.6%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS16509          5053     2854     2199    43.5%   AMAZON-02, US
        AS18403          3451     1261     2190    63.5%   FPT-AS-AP FPT Telecom Company, VN
        AS39891          2085      133     1952    93.6%   ALJAWWALSTC-AS, SA
        AS24547          1732       34     1698    98.0%   CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
        AS11172          2265      568     1697    74.9%   Alestra, S. de R.L. de C.V., MX
        AS22773          1465       55     1410    96.2%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS56041          1500      113     1387    92.5%   CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
        AS56046          1407       60     1347    95.7%   CMNET-JIANGSU-AP China Mobile communications corporation, CN
        AS28573          1576      238     1338    84.9%   Claro NXT Telecomunicacoes Ltda, BR
        AS32098          1487      171     1316    88.5%   TRANSTELCO-INC, US
        AS56044          1247       22     1225    98.2%   CMNET-AS-LIAONING China Mobile communications corporation, CN
        AS47331          1258       45     1213    96.4%   TTNET, TR
        AS45271          1337      273     1064    79.6%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS26611          1128       79     1049    93.0%   COMUNICACION CELULAR S.A. COMCEL S.A., CO
        AS5416           1040        5     1035    99.5%   Internet Service Provider, BH
        AS132884         1028        4     1024    99.6%   SUMMIT-BD Summit Communications Limited, BD
        AS4808           1156      142     1014    87.7%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS12479          1618      668      950    58.7%   UNI2-AS, ES
        AS62240          1013      115      898    88.6%   CLOUVIDER Clouvider - Global ASN, GB
        AS38266          1355      471      884    65.2%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS17853           787       25      762    96.8%   LGTELECOM-AS-KR LGTELECOM, KR
        AS11664           952      245      707    74.3%   Techtel LMDS Comunicaciones Interactivas S.A., AR
        AS56167           648       14      634    97.8%   PTML-PK Plot No 181-186 Street, PK
        AS12025           656       37      619    94.4%   IMDC-AS12025, US
        AS4134            620       39      581    93.7%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS56047           724      148      576    79.6%   CMNET-HUNAN-AP China Mobile communications corporation, CN

        Total           55221     9903    45318    82.1%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            6682 AS9808  CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
            5053 AS16509 AMAZON-02, US
            3965 AS7552  VIETEL-AS-AP Viettel Group, VN
            3451 AS18403 FPT-AS-AP FPT Telecom Company, VN
            3439 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            2871 AS13335 CLOUDFLARENET, US
            2547 AS60539 HUICAST_TELECOM, HK
            2265 AS11172 Alestra, S. de R.L. de C.V., MX
            2085 AS39891 ALJAWWALSTC-AS, SA
            1732 AS24547 CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
            1725 AS36183 AKAMAI-AS, US
            1618 AS12479 UNI2-AS, ES
            1587 AS20115 CHARTER-20115, US
            1576 AS28573 Claro NXT Telecomunicacoes Ltda, BR
            1508 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            1500 AS56041 CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
            1487 AS32098 TRANSTELCO-INC, US
            1465 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1407 AS56046 CMNET-JIANGSU-AP China Mobile communications corporation, CN
            1391 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.