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Geoff Huston

Comments to: cidr-reports@potaroo.net



IPv6 CIDR REPORT for 7 Dec 25

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Sun Dec 7 02:46:35 2025 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        30-11-25    238968      117458
        01-12-25    238981      116978
        02-12-25    239027      117056
        03-12-25    238629      117062
        04-12-25    238963      117144
        05-12-25    238952      117239
        06-12-25    239112      117301
        07-12-25    239036      117301

 

AS Summary


         35996  Number of ASes in routing system
         17867  Number of ASes announcing only one prefix
          6752  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.

         --- 07Dec25 ---
        ASnum         NetsNow NetsAggr  NetGain   % Gain   Description

        Table          239073   117349   121724    50.9%   All ASes

        AS9808           6752      906     5846    86.6%   CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
        AS4538           4984      410     4574    91.8%   ERX-CERNET-BKB China Education and Research Network Center, CN
        AS7552           3967        6     3961    99.8%   VIETEL-AS-AP Viettel Group, VN
        AS45609          3579      765     2814    78.6%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS60539          2549       31     2518    98.8%   HUICAST_TELECOM, HK
        AS16509          5406     3034     2372    43.9%   AMAZON-02, US
        AS18403          3341     1240     2101    62.9%   FPT-AS-AP FPT Telecom Company, VN
        AS39891          1974      113     1861    94.3%   ALJAWWALSTC-AS, SA
        AS24547          1736       33     1703    98.1%   CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
        AS56041          1749      127     1622    92.7%   CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
        AS32098          1653      154     1499    90.7%   TRANSTELCO-INC, US
        AS11172          2131      721     1410    66.2%   Alestra, S. de R.L. de C.V., MX
        AS22773          1440       52     1388    96.4%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS28573          1578      239     1339    84.9%   Claro NXT Telecomunicacoes Ltda, BR
        AS56046          1518      179     1339    88.2%   CMNET-JIANGSU-AP China Mobile communications corporation, CN
        AS56044          1248       25     1223    98.0%   CMNET-AS-LIAONING China Mobile communications corporation, CN
        AS47331          1272       57     1215    95.5%   TTNET, TR
        AS26611          1190       81     1109    93.2%   COMUNICACION CELULAR S.A. COMCEL S.A., CO
        AS5416           1042        3     1039    99.7%   Internet Service Provider, BH
        AS132884         1028        4     1024    99.6%   SUMMIT-BD Summit Communications Limited, BD
        AS45271          1241      280      961    77.4%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS62240          1105      147      958    86.7%   CLOUVIDER Clouvider - Global ASN, GB
        AS38266          1374      432      942    68.6%   VIL-AS-AP Vodafone Idea Ltd, IN
        AS4808            982      156      826    84.1%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS12479          1476      662      814    55.1%   UNI2-AS, ES
        AS17853           787       10      777    98.7%   LGTELECOM-AS-KR LGTELECOM, KR
        AS56167           648       14      634    97.8%   PTML-PK Plot No 181-186 Street, PK
        AS12025           633       41      592    93.5%   IMDC-AS12025, US
        AS4134            626       45      581    92.8%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS11664          1153      574      579    50.2%   Techtel LMDS Comunicaciones Interactivas S.A., AR

        Total           60162    10541    49621    82.5%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            6752 AS9808  CHINAMOBILE-CN China Mobile Communications Group Co., Ltd., CN
            5406 AS16509 AMAZON-02, US
            4984 AS4538  ERX-CERNET-BKB China Education and Research Network Center, CN
            3967 AS7552  VIETEL-AS-AP Viettel Group, VN
            3579 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            3341 AS18403 FPT-AS-AP FPT Telecom Company, VN
            2941 AS13335 CLOUDFLARENET, US
            2549 AS60539 HUICAST_TELECOM, HK
            2131 AS11172 Alestra, S. de R.L. de C.V., MX
            1974 AS39891 ALJAWWALSTC-AS, SA
            1749 AS56041 CMNET-ZHEJIANG-AP China Mobile communications corporation, CN
            1736 AS24547 CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN
            1653 AS32098 TRANSTELCO-INC, US
            1643 AS36183 AKAMAI-AS, US
            1618 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
            1578 AS28573 Claro NXT Telecomunicacoes Ltda, BR
            1518 AS56046 CMNET-JIANGSU-AP China Mobile communications corporation, CN
            1476 AS12479 UNI2-AS, ES
            1461 AS6167  CELLCO-PART, US
            1440 AS22773 ASN-CXA-ALL-CCI-22773-RDC, 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.