Report for 201126

Name

CDW-UK-AS - CDW Ltd, 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.

201126 CDW-UK-AS - CDW Ltd, GB

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS7575          AARNET-AS-AP - Australian Academic and Research Network (AARNet), AU
    AS3257          GTT-BACKBONE - GTT Communications Inc., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
17689 AS201126       ORIGIN  Originate:       4096 /20.00  Transit:          0 /0.00  CDW-UK-AS - CDW Ltd, 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       %
18529 AS201126      CDW-UK-AS - CDW Ltd, GB                           12      4      2     10      2  16.67%


  Prefix               AS Path                              Aggregation Suggestion
  91.240.17.0/24       4608 7575 201126       
  153.92.43.0/24       4608 7575 201126       
  153.92.44.0/23       4608 7575 201126     + Announce - aggregate of 153.92.44.0/24 (4608 7575 201126) and 153.92.45.0/24 (4608 7575 201126)
  153.92.44.0/24       4608 7575 201126     - Withdrawn - aggregated with 153.92.45.0/24 (4608 7575 201126)
  153.92.45.0/24       4608 7575 201126     - Withdrawn - aggregated with 153.92.44.0/24 (4608 7575 201126)
  153.92.46.0/24       4608 7575 201126       
  157.97.128.0/22      4608 7575 201126       
  185.74.25.0/24       4608 7575 201126       
  185.74.26.0/23       4608 7575 201126     + Announce - aggregate of 185.74.26.0/24 (4608 7575 201126) and 185.74.27.0/24 (4608 7575 201126)
  185.74.26.0/24       4608 7575 201126     - Withdrawn - aggregated with 185.74.27.0/24 (4608 7575 201126)
  185.74.27.0/24       4608 7575 201126     - Withdrawn - aggregated with 185.74.26.0/24 (4608 7575 201126)
  185.176.242.0/23     4777 2516 3257 201126   
  188.116.54.0/24      4608 7575 201126       
  194.105.149.0/24     4608 7575 201126       

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

AS201126   7 More Specifics   12 Total Advertisements   CDW-UK-AS - CDW Ltd, GB
    153.92.44.0/24                153.92.44.0/23
    153.92.45.0/24                153.92.44.0/23
    185.74.25.0/24                185.74.24.0/22
    185.74.26.0/24                185.74.24.0/22
    185.74.27.0/24                185.74.24.0/22
    185.176.242.0/23              185.176.240.0/22
    188.116.54.0/24               188.116.54.0/23

Whois Entry

whois: 402603

IANA has recorded AS201126 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS201126\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 'AS200537 - AS203022'
             
             as-block:       AS200537 - AS203022
             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:        2026-04-08T13:28:00Z
             last-modified:  2026-04-08T13:28:00Z
             source:         RIPE
             
             % Information related to 'AS201126'
             
             % Abuse contact for 'AS201126' is 'ip-abuse@uk.cdw.com'
             
             aut-num:        AS201126
             descr:          CDW UK - Cloud Services
             as-name:        CDW-UK-AS
             org:            ORG-KL129-RIPE
             import:         from AS5089 accept ANY
             export:         to AS5089 announce AS201126
             import:         from AS50173 accept ANY
             export:         to AS50173 announce AS201126
             import:         from AS6939 accept AS6939
             export:         to AS6939 announce AS201126
             import:         from AS714 accept AS714
             export:         to AS714 announce AS201126
             import:         from AS8075 accept AS8075
             export:         to AS8075 announce AS201126
             import:         from AS6461 accept ANY
             export:         to AS6461 announce AS201126
             import:         from AS174 accept ANY
             export:         to AS174 announce AS201126
             admin-c:        TL6622-RIPE
             tech-c:         TL6622-RIPE
             status:         ASSIGNED
             mnt-by:         TL-20221116-MNT
             mnt-by:         RIPE-NCC-END-MNT
             created:        2015-01-21T07:23:06Z
             last-modified:  2022-12-23T13:54:36Z
             source:         RIPE
             
             organisation:   ORG-KL129-RIPE
             org-name:       CDW Ltd
             country:        GB
             reg-nr:         02465350
             org-type:       LIR
             address:        1 NEW CHANGE
                             3RD FLOOR
             address:        EC4M 9AF
             address:        London
             address:        UNITED KINGDOM
             phone:          +442077916000
             fax-no:         +442077916200
             abuse-c:        AR17749-RIPE
             mnt-ref:        RIPE-NCC-HM-MNT
             mnt-ref:        TL-20221116-MNT
             mnt-by:         RIPE-NCC-HM-MNT
             mnt-by:         TL-20221116-MNT
             created:        2013-05-10T13:52:28Z
             last-modified:  2026-05-13T07:34:44Z
             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 1.122.1 (DEXTER)