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Geoff Huston

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IPv6 CIDR REPORT for 29 Apr 17

Report Sections:


This report is generated from an analysis of the BGP routing table within AS2.0 (RouteViews), and was produced at Sat Apr 29 20:15:05 2017 AEST.


Status Summary

Table History


        Date      Prefixes    CIDR Agg
        22-04-17     40362       27554
        23-04-17     40552       27641
        24-04-17     40534       27727
        25-04-17     40637       27674
        26-04-17     40636       27406
        27-04-17     40661       27432
        28-04-17     40716       27423
        29-04-17     40804       27469

 

AS Summary


         13500  Number of ASes in routing system
          9246  Number of ASes announcing only one prefix
          1404  Largest number of prefixes announced by an AS
                AS22773: ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
      36318243520512 (/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.

         --- 29Apr17 ---
        ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

        Table      40832    27518    13314    32.6%   All ASes

        AS22773     1404       51     1353    96.4%   ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US
        AS28573      681      182      499    73.3%   CLARO S.A., BR
        AS3651       368       57      311    84.5%   SPRINT-BB6 - Sprint, US
        AS174        588      292      296    50.3%   COGENT-174 - Cogent Communications, US
        AS55430      292       31      261    89.4%   STARHUBINTERNET-AS-NGNBN Starhub Internet Pte Ltd, SG
        AS16509      480      220      260    54.2%   AMAZON-02 - Amazon.com, Inc., US
        AS9605       268        9      259    96.6%   DOCOMO NTT DOCOMO, INC., JP
        AS13206      258        1      257    99.6%   REALMOVE-AS-AP Realmove Company Limited, TH
        AS20277      255        8      247    96.9%   OSP-EU-WEST-001, GB
        AS32098      405      168      237    58.5%   TRANSTELCO-INC - Transtelco Inc, US
        AS8151       204       15      189    92.6%   Uninet S.A. de C.V., MX
        AS18403      191        8      183    95.8%   FPT-AS-AP The Corporation for Financing & Promoting Technology, VN
        AS30036      223       59      164    73.5%   MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US
        AS36992      166       28      138    83.1%   ETISALAT-MISR, EG
        AS20057      149       25      124    83.2%   ATT-MOBILITY-LLC-AS20057 - AT&T Mobility LLC, US
        AS25019      169       45      124    73.4%   SAUDINETSTC-AS, SA
        AS22394      441      334      107    24.3%   CELLCO - Cellco Partnership DBA Verizon Wireless, US
        AS13361      109        7      102    93.6%   VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU
        AS13122      129       34       95    73.6%   MTS-INDIA-IN 334,Udyog Vihar, IN
        AS43766       99       23       76    76.8%   MTC-KSA-AS, SA
        AS6327        79        5       74    93.7%   SHAW - Shaw Communications Inc., CA
        AS15169       88       14       74    84.1%   GOOGLE - Google Inc., US
        AS15133      339      269       70    20.6%   EDGECAST - MCI Communications Services, Inc. d/b/a Verizon Business, US
        AS17552       84       17       67    79.8%   TRUE-AS-AP True Internet Co.,Ltd., TH
        AS21928      115       51       64    55.7%   T-MOBILE-AS21928 - T-Mobile USA, Inc., US
        AS17451       67        4       63    94.0%   BIZNET-AS-AP BIZNET NETWORKS, ID
        AS13489       74       12       62    83.8%   EPM Telecomunicaciones S.A. E.S.P., CO
        AS26297       63        2       61    96.8%   Tudo Internet, BR
        AS6147        71       12       59    83.1%   Telefonica del Peru S.A.A., PE
        AS17832       91       33       58    63.7%   SIXNGIX Korea Internet Security Agency, KR

        Total       7950     2016     5934    74.6%   Top 30 total


        Top 20 Route Count per Originating AS
        Prefixes ASnum   AS Description


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.