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Geoff Huston

Comments to: cidr-reports@potaroo.net



IPv6 CIDR REPORT for 19 Apr 24

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Fri Apr 19 01:46:15 2024 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        12-04-24    208659      106389
        13-04-24    208711      106379
        14-04-24    208679      106378
        15-04-24    208672      106244
        16-04-24    208643      102752
        17-04-24    208617      102880
        18-04-24    208731      103049
        19-04-24    208732      103049

 

AS Summary


         33157  Number of ASes in routing system
         20750  Number of ASes announcing only one prefix
          6684  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.

         --- 19Apr24 ---
        ASnum         NetsNow NetsAggr  NetGain   % Gain   Description

        Table          208775   103047   105728    50.6%   All ASes

        AS11172          6684      992     5692    85.2%   Alestra, S. de R.L. de C.V., MX
        AS9808           4711     1098     3613    76.7%   CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
        AS7552           2906        3     2903    99.9%   VIETEL-AS-AP Viettel Group, VN
        AS18403          3959     1416     2543    64.2%   FPT-AS-AP FPT Telecom Company, VN
        AS60539          2054        7     2047    99.7%   HUICAST_TELECOM, HK
        AS16509          4727     2702     2025    42.8%   AMAZON-02, US
        AS24547          2030       27     2003    98.7%   CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
        AS45609          2650      689     1961    74.0%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS45271          1818      278     1540    84.7%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS39891          1537      106     1431    93.1%   ALJAWWALSTC-AS, SA
        AS12479          1509      140     1369    90.7%   UNI2-AS, ES
        AS132884         1284        3     1281    99.8%   SUMMIT-BD Summit Communications Limited, BD
        AS28573          1461      232     1229    84.1%   Claro NXT Telecomunicacoes Ltda, BR
        AS22773          1262       51     1211    96.0%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS32098          1380      220     1160    84.1%   TRANSTELCO-INC, US
        AS24432          1205       60     1145    95.0%   AXIATA-ROBI-AS-AP TM International Bangladesh Ltd.Internet service Provider,Gulshan-1,Dhaka-1212, BD
        AS4538           1642      510     1132    68.9%   ERX-CERNET-BKB China Education and Research Network Center, CN
        AS56046          1162       48     1114    95.9%   CMNET-JIANGSU-AP China Mobile communications corporation, CN
        AS38266          1510      428     1082    71.7%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS62240          1143       79     1064    93.1%   CLOUVIDER Clouvider - Global ASN, GB
        AS56044          1095       47     1048    95.7%   CMNET-AS-LIAONING China Mobile communications corporation, CN
        AS5416           1037        7     1030    99.3%   Internet Service Provider, BH
        AS4808           1071      130      941    87.9%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS17853           739        4      735    99.5%   LGTELECOM-AS-KR LGTELECOM, KR
        AS56167           648       14      634    97.8%   PTML-PK Plot No 181-186 Street, PK
        AS26611           636       44      592    93.1%   COMUNICACION CELULAR S.A. COMCEL S.A., CO
        AS4134            604       24      580    96.0%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS12025           611       35      576    94.3%   IMDC-AS12025, US
        AS17072          1317      741      576    43.7%   TOTAL PLAY TELECOMUNICACIONES SA DE CV, MX
        AS56047           718      144      574    79.9%   CMNET-HUNAN-AP China Mobile communications corporation, CN

        Total           55110    10279    44831    81.3%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            6684 AS11172 Alestra, S. de R.L. de C.V., MX
            4727 AS16509 AMAZON-02, US
            4711 AS9808  CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
            3959 AS18403 FPT-AS-AP FPT Telecom Company, VN
            2906 AS7552  VIETEL-AS-AP Viettel Group, VN
            2650 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            2054 AS60539 HUICAST_TELECOM, HK
            2030 AS24547 CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
            1818 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
            1642 AS4538  ERX-CERNET-BKB China Education and Research Network Center, CN
            1608 AS13335 CLOUDFLARENET, US
            1537 AS39891 ALJAWWALSTC-AS, SA
            1534 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            1510 AS38266 VIL-AS-AP Vodafone Idea Ltd, IN
            1509 AS12479 UNI2-AS, ES
            1461 AS28573 Claro NXT Telecomunicacoes Ltda, BR
            1380 AS32098 TRANSTELCO-INC, US
            1355 AS36183 AKAMAI-AS, US
            1317 AS17072 TOTAL PLAY TELECOMUNICACIONES SA DE CV, MX
            1284 AS132884 SUMMIT-BD Summit Communications Limited, BD


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.