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Geoff Huston

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IPv6 CIDR REPORT for 18 Jan 19

Report Sections:


This report is generated from an analysis of the BGP routing table withinAS131072, and was produced at Fri Jan 18 16:45:43 2019 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        11-01-19     62826       37339
        12-01-19     62700       37320
        13-01-19     62669       37334
        14-01-19     62716       37335
        15-01-19     62728       37271
        16-01-19     62711       37430
        17-01-19     62795       37467
        18-01-19     62896       37467

 

AS Summary


         16533  Number of ASes in routing system
         10892  Number of ASes announcing only one prefix
          1342  Largest number of prefixes announced by an AS
                AS12479: UNI2-AS, ES
      36318243454976 (/18.95) Largest address span announced by an AS (/64s)
                AS7922 : COMCAST-7922 - Comcast Cable Communications, LLC, 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.

         --- 18Jan19 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      62960    37553    25407    40.4%   All ASes

        AS12479     1342        6     1336    99.6%   UNI2-AS, ES
        AS22773      979       18      961    98.2%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS28573      933      135      798    85.5%   CLARO S.A., BR
        AS33363      648       69      579    89.4%   BHN-33363 - Charter Communications, Inc, US
        AS32098      622       61      561    90.2%   TRANSTELCO-INC - Transtelco Inc, US
        AS11172      582       36      546    93.8%   Alestra, S. de R.L. de C.V., MX
        AS7552       660      117      543    82.3%   VIETEL-AS-AP Viettel Group, VN
        AS45609      613       93      520    84.8%   BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
        AS30036      717      237      480    66.9%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS45271      521      104      417    80.0%   ICLNET-AS-AP Idea Cellular Limited, IN
        AS17622      490       95      395    80.6%   CNCGROUP-GZ China Unicom Guangzhou network, CN
        AS13361      572      198      374    65.4%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS16509      766      413      353    46.1%   AMAZON-02 - Amazon.com, Inc., US
        AS9808       343       29      314    91.5%   CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
        AS174        411      111      300    73.0%   COGENT-174 - Cogent Communications, US
        AS3462       265        4      261    98.5%   HINET Data Communication Business Group, TW
        AS9605       272       13      259    95.2%   DOCOMO NTT DOCOMO, INC., JP
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS55430      282       31      251    89.0%   STARHUB-NGNBN Starhub Ltd, SG
        AS13142      259       33      226    87.3%   MOBIFONE-AS-VN MOBIFONE Corporation, VN
        AS4808       225       21      204    90.7%   CHINA169-BJ China Unicom Beijing Province Network, CN
        AS8151       256       56      200    78.1%   Uninet S.A. de C.V., MX
        AS54540      304      112      192    63.2%   INCERO-HVVC - HIVELOCITY, Inc., US
        AS3651       221       36      185    83.7%   SPRINT-BB6 - Sprint, US
        AS54113      578      397      181    31.3%   FASTLY - Fastly, US
        AS10507      201       34      167    83.1%   SPCS - Sprint Personal Communications Systems, US
        AS17621      181       16      165    91.2%   CNCGROUP-SH China Unicom Shanghai network, CN
        AS18403      169        6      163    96.4%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS17552      180       23      157    87.2%   TRUE-AS-AP True Internet Co.,Ltd., TH
        AS22394      494      349      145    29.4%   CELLCO - Cellco Partnership DBA Verizon Wireless, US

        Total      14344     2854    11490    80.1%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description
            1342 AS12479 UNI2-AS, ES
             979 AS22773 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
             933 AS28573 CLARO S.A., BR
             766 AS16509 AMAZON-02 - Amazon.com, Inc., US
             717 AS30036 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
             660 AS7552  VIETEL-AS-AP Viettel Group, VN
             648 AS33363 BHN-33363 - Charter Communications, Inc, US
             622 AS32098 TRANSTELCO-INC - Transtelco Inc, US
             613 AS45609 BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN
             582 AS11172 Alestra, S. de R.L. de C.V., MX
             578 AS54113 FASTLY - Fastly, US
             572 AS133612 VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
             521 AS13335 CLOUDFLARENET - Cloudflare, Inc., US
             521 AS45271 ICLNET-AS-AP Idea Cellular Limited, IN
             501 AS20940 AKAMAI-ASN1, US
             494 AS22394 CELLCO - Cellco Partnership DBA Verizon Wireless, US
             490 AS17622 CNCGROUP-GZ China Unicom Guangzhou network, CN
             411 AS174   COGENT-174 - Cogent Communications, US
             343 AS9808  CMNET-GD Guangdong Mobile Communication Co.Ltd., CN
             336 AS19551 INCAPSULA - Incapsula Inc, 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.