Report for 13205

Name

BTWWIDC-H Autonomous System, GB

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

13205 BTWWIDC-H Autonomous System, GB

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS5400          BT, GB
    AS2856          BT-UK-AS BTnet UK Regional network, GB

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
6694  AS13205        ORIGIN  Originate:      20992 /17.64  Transit:          0 /0.00  BTWWIDC-H Autonomous System, GB

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
 4900 AS13205       BTWWIDC-H Autonomous System, GB                   16     10      0      6     10  62.50%


  Prefix               AS Path                              Aggregation Suggestion
  31.11.56.0/23        4777 2497 5400 13205   
  78.109.0.0/20        4777 2497 5400 13205   
  78.109.0.0/24        4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.5.0/24        4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.6.0/24        4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.7.0/24        4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.9.0/24        4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.10.0/24       4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  78.109.11.0/24       4777 2497 5400 13205 - Withdrawn - matching aggregate 78.109.0.0/20 4777 2497 5400 13205
  137.213.239.0/24     4777 2497 5400 2856 13205   
  137.213.252.0/23     4777 2497 5400 2856 13205   
  217.140.0.0/20       4777 2497 5400 13205   
  217.140.12.0/22      4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205
  217.140.12.0/24      4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205
  217.140.13.0/24      4777 2497 5400 13205 - Withdrawn - matching aggregate 217.140.0.0/20 4777 2497 5400 13205
  217.140.32.0/19      4777 2497 5400 2856 13205   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS13205   13 More Specifics   16 Total Advertisements   BTWWIDC-H Autonomous System, GB
    31.11.56.0/23                 31.11.56.0/21
    78.109.0.0/24                 78.109.0.0/20
    78.109.5.0/24                 78.109.0.0/20
    78.109.6.0/24                 78.109.0.0/20
    78.109.7.0/24                 78.109.0.0/20
    78.109.9.0/24                 78.109.0.0/20
    78.109.10.0/24                78.109.0.0/20
    78.109.11.0/24                78.109.0.0/20
    137.213.239.0/24              137.213.0.0/16
    137.213.252.0/23              137.213.0.0/16
    217.140.12.0/22               217.140.0.0/20
    217.140.12.0/24               217.140.0.0/20
    217.140.13.0/24               217.140.0.0/20

Whois Entry

whois: 402332

IANA has recorded AS13205 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS13205\n             % This is the RIPE Database query service.
             % The objects are in RPSL format.
             %
             % The RIPE Database is subject to Terms and Conditions.
             % See https://docs.db.ripe.net/terms-conditions.html
             
             % Note: this output has been filtered.
             
             % Information related to 'AS12557 - AS13223'
             
             as-block:       AS12557 - AS13223
             descr:          RIPE NCC ASN block
             remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
             mnt-by:         RIPE-NCC-HM-MNT
             created:        2018-11-22T15:27:24Z
             last-modified:  2018-11-22T15:27:24Z
             source:         RIPE
             
             % Information related to 'AS13205'
             
             % Abuse contact for 'AS13205' is 'protect@bt.com'
             
             aut-num:        AS13205
             as-name:        UNSPECIFIED
             descr:          BTWWIDC-H Autonomous System
             descr:          BT Global Services DCS WorldWide Internet Data Centre
             descr:          Amsterdam
             org:            ORG-BT4-RIPE
             import:         from AS5400 action pref=100; accept ANY
             import:         from AS2855 action pref=90; accept ANY
             import:         from AS9335 action pref=100; accept ANY
             import:         from AS4295 action pref=100; accept ANY
             import:         from AS12541 action pref=100; accept ANY
             export:         to AS5400 announce AS13205
             export:         to AS2855 announce AS13205
             export:         to AS9335 announce AS13205
             export:         to AS4295 announce AS13205
             export:         to AS12541 announce AS13205
             default:        to AS2855 action pref=90; networks ANY
             admin-c:        ICHR1-RIPE
             tech-c:         ICHR1-RIPE
             status:         ASSIGNED
             mnt-by:         RIPE-NCC-END-MNT
             mnt-by:         ICH-MNT
             created:        1970-01-01T00:00:00Z
             last-modified:  2017-11-15T09:15:51Z
             source:         RIPE
             
             organisation:   ORG-BT4-RIPE
             org-name:       British Telecommunications PLC
             country:        GB
             org-type:       LIR
             address:        pp HWJ380, PO Box 78961
                             1 Braham Street
             address:        E1W 9TD
             address:        London
             address:        UNITED KINGDOM
             phone:          +44 3316 260934
             admin-c:        BTCR1-RIPE
             admin-c:        MS35380-RIPE
             mnt-ref:        BTENT-MNT
             mnt-ref:        RIPE-NCC-HM-MNT
             mnt-by:         RIPE-NCC-HM-MNT
             mnt-by:         BTENT-MNT
             abuse-c:        BTCR3-RIPE
             created:        2004-04-17T12:11:54Z
             last-modified:  2025-06-19T11:44:33Z
             source:         RIPE # Filtered
             
             %ERROR:201: access denied for 2401:2000:6660:0:0:0:0:13
             %
             % Queries from your IP address have passed the daily limit of controlled objects.
             % Access from your host has been temporarily denied.
             % For more information, see
             % https://docs.db.ripe.net/FAQ/#why-did-i-receive-an-error-201-access-denied
             
             % This query was served by the RIPE Database Query Service version 1.121.2 (SHETLAND)