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Geoff Huston

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IPv6 CIDR REPORT for 21 May 19

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Tue May 21 11:45:46 2019 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        14-05-19     69410       40939
        15-05-19     69516       39974
        16-05-19     69546       40215
        17-05-19     69549       40401
        18-05-19     69650       40490
        19-05-19     69732       40518
        20-05-19     69785       40586
        21-05-19     69857       40586

 

AS Summary


         17204  Number of ASes in routing system
         11189  Number of ASes announcing only one prefix
          1387  Largest number of prefixes announced by an AS
                AS12479: UNI2-AS, ES
      4504843307319296 (/12.00) Largest address span announced by an AS (/64s)
                AS701  : UUNET - MCI Communications Services, Inc. d/b/a Verizon Business, 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.

         --- 21May19 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      69862    40589    29273    41.9%   All ASes

        AS12479     1387        6     1381    99.6%   UNI2-AS, ES
        AS22773      987       14      973    98.6%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS28573     1093      131      962    88.0%   CLARO S.A., BR
        AS11172      877      118      759    86.5%   Alestra, S. de R.L. de C.V., MX
        AS7552       758        6      752    99.2%   VIETEL-AS-AP Viettel Group, VN
        AS45609      767      110      657    85.7%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS32098      656       28      628    95.7%   TRANSTELCO-INC - Transtelco Inc, US
        AS8376      1271      646      625    49.2%   , JO
        AS33363      669       65      604    90.3%   BHN-33363 - Charter Communications, Inc, US
        AS30036      730      212      518    71.0%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS45271      580      151      429    74.0%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS13361      566      191      375    66.3%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS16509      807      454      353    43.7%   AMAZON-02 - Amazon.com, Inc., US
        AS9829       450       98      352    78.2%   BSNL-NIB National Internet Backbone, IN
        AS13142      333       14      319    95.8%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS9808       345       29      316    91.6%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS174        431      129      302    70.1%   COGENT-174 - Cogent Communications, US
        AS17622      495      227      268    54.1%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS3462       267        5      262    98.1%   HINET Data Communication Business Group, TW
        AS9605       272       14      258    94.9%   DOCOMO NTT DOCOMO, INC., JP
        AS24173      258        1      257    99.6%   NETNAM-AS-AP Netnam Company, VN
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS55430      289       40      249    86.2%   STARHUB-NGNBN Starhub Ltd, SG
        AS4808       230       24      206    89.6%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS54113      602      414      188    31.2%   FASTLY - Fastly, US
        AS8151       262       94      168    64.1%   Uninet S.A. de C.V., MX
        AS17621      183       15      168    91.8%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS24158      195       32      163    83.6%   TAIWANMOBILE-AS Taiwan Mobile Co., Ltd., TW
        AS38266      237       77      160    67.5%   VODAFONE-IN Vodafone India Ltd., IN
        AS3651       187       32      155    82.9%   SPRINT-BB6 - Sprint, US

        Total      16442     3378    13064    79.5%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            1387 AS12479 UNI2-AS, ES
            1271 AS8376  , JO
            1093 AS28573 CLARO S.A., BR
             987 AS22773 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
             877 AS11172 Alestra, S. de R.L. de C.V., MX
             807 AS16509 AMAZON-02 - Amazon.com, Inc., US
             767 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
             758 AS7552  VIETEL-AS-AP Viettel Group, VN
             730 AS30036 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
             674 AS13335 CLOUDFLARENET - Cloudflare, Inc., US
             669 AS33363 BHN-33363 - Charter Communications, Inc, US
             656 AS32098 TRANSTELCO-INC - Transtelco Inc, US
             634 AS22394 CELLCO - Cellco Partnership DBA Verizon Wireless, US
             602 AS54113 FASTLY - Fastly, US
             580 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
             566 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
             532 AS20940 AKAMAI-ASN1, US
             495 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
             450 AS9829  BSNL-NIB National Internet Backbone, IN
             431 AS174   COGENT-174 - Cogent Communications, 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.