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Geoff Huston

Comments to: cidr-reports@potaroo.net


IPv6 CIDR REPORT for 19 Sep 20

Report Sections:

This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Sat Sep 19 23:45:40 2020 AEST.

Status Summary

Table History


        Date      Prefixes    CIDR Agg
        12-09-20     94958       55023
        13-09-20     94993       55028
        14-09-20     95005       55117
        15-09-20     95253       55251
        16-09-20     95384       55189
        17-09-20     95531       55156
        18-09-20     95373       55778
        19-09-20     95392       55778

 

AS Summary


         20635  Number of ASes in routing system
         13024  Number of ASes announcing only one prefix
          2531  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. 

         --- 19Sep20 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      95368    55789    39579    41.5%   All ASes

        AS11172     2531      102     2429    96.0%   Alestra, S. de R.L. de C.V., MX
        AS45609     1829      329     1500    82.0%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS12479     1468        4     1464    99.7%   UNI2-AS, ES
        AS22773     1195       86     1109    92.8%   ASN-CXA-ALL-CCI-22773-RDC, US
        AS28573     1220      122     1098    90.0%   CLARO S.A., BR
        AS45271     1235      186     1049    84.9%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS7552       975        4      971    99.6%   VIETEL-AS-AP Viettel Group, VN
        AS39891      692        7      685    99.0%   ALJAWWALSTC-AS, SA
        AS16509     1288      782      506    39.3%   AMAZON-02, US
        AS62240      452       17      435    96.2%   CLOUVIDER Clouvider - Global ASN, GB
        AS38266      607      177      430    70.8%   VODAFONE-IN Vodafone India Ltd., IN
        AS30036      564      186      378    67.0%   MEDIACOM-ENTERPRISE-BUSINESS, US
        AS4134       503      132      371    73.8%   CHINANET-BACKBONE No.31,Jin-rong Street, CN
        AS17552      381       22      359    94.2%   TRUE-AS-AP True Internet Co.,Ltd., TH
        AS13142      379       28      351    92.6%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS17622     1016      670      346    34.1%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS32098      771      478      293    38.0%   TRANSTELCO-INC, US
        AS9829       418      135      283    67.7%   BSNL-NIB National Internet Backbone, IN
        AS55430      297       29      268    90.2%   STARHUB-NGNBN Starhub Ltd, SG
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS24173      258        3      255    98.8%   NETNAM-AS-AP Netnam Company, VN
        AS45899      272       19      253    93.0%   VNPT-AS-VN VNPT Corp, VN
        AS9605       271       19      252    93.0%   DOCOMO NTT DOCOMO, INC., JP
        AS54113      770      535      235    30.5%   FASTLY, US
        AS20940      660      428      232    35.2%   AKAMAI-ASN1, EU
        AS174        344      117      227    66.0%   COGENT-174, US
        AS55303      301       80      221    73.4%   EAGLENET-AP 60 Market Square,P.O. Box 364, PH
        AS13361      387      173      214    55.3%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS12252      263       58      205    77.9%   America Movil Peru S.A.C., PE
        AS33363      667      462      205    30.7%   BHN-33363, US

        Total      22272     5391    16881    75.8%   Top 30 total




        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            2531 AS11172 Alestra, S. de R.L. de C.V., MX
            1829 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
            1468 AS12479 UNI2-AS, ES
            1288 AS16509 AMAZON-02, US
            1235 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
            1220 AS28573 CLARO S.A., BR
            1195 AS22773 ASN-CXA-ALL-CCI-22773-RDC, US
            1016 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
             975 AS7552  VIETEL-AS-AP Viettel Group, VN
             810 AS13335 CLOUDFLARENET, US
             771 AS32098 TRANSTELCO-INC, US
             770 AS54113 FASTLY, US
             722 AS22394 CELLCO, US
             692 AS39891 ALJAWWALSTC-AS, SA
             667 AS33363 BHN-33363, US
             660 AS20940 AKAMAI-ASN1, EU
             607 AS38266 VODAFONE-IN Vodafone India Ltd., IN
             564 AS30036 MEDIACOM-ENTERPRISE-BUSINESS, US
             503 AS4134  CHINANET-BACKBONE No.31,Jin-rong Street, CN
             493 AS19551 INCAPSULA, 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.