Report for 51809

Name

BRSK - BRSK Limited, 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.

51809 BRSK - BRSK Limited, GB

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS212655        youfibre - YouFibre Limited, GB
  Downstream Adjacent AS list
    AS216405        MSUK-ISP - Metric Systems UK LTD, GB

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
5559  AS51809        ORG+TRN Originate:      29952 /17.13  Transit:       1024 /22.00 BRSK - BRSK Limited, 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       %
 2554 AS51809       BRSK - BRSK Limited, GB                           38     24      2     16     22  57.89%


  Prefix               AS Path                              Aggregation Suggestion
  31.98.72.0/21        4608 7575 2914 212655 51809   
  31.98.80.0/20        4608 7575 2914 212655 51809   
  45.41.148.0/22       4608 7575 2914 212655 51809   
  45.61.104.0/21       4608 7575 2914 212655 51809   
  45.82.140.0/22       4608 7575 2914 212655 51809   
  63.135.72.0/21       4608 7575 2914 212655 51809   
  67.208.52.0/22       4608 7575 2914 212655 51809   
  88.97.160.0/21       4608 7575 2914 212655 51809   
  88.97.176.0/20       4608 7575 2914 212655 51809   
  104.238.40.0/21      4608 7575 2914 212655 51809   
  104.238.58.0/23      4608 7575 2914 212655 51809   
  104.238.62.0/23      4608 7575 2914 212655 51809   
  185.138.196.0/22     4608 7575 2914 212655 51809   
  185.232.119.0/24     4608 7575 2914 212655 51809   
  195.40.32.0/20       4608 7575 2914 212655 51809 + Announce - aggregate of 195.40.32.0/21 (4608 7575 2914 212655 51809) and 195.40.40.0/21 (4608 7575 2914 212655 51809)
  195.40.32.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.33.0/24 (4608 7575 2914 212655 51809)
  195.40.33.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.32.0/24 (4608 7575 2914 212655 51809)
  195.40.34.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.35.0/24 (4608 7575 2914 212655 51809)
  195.40.35.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.34.0/24 (4608 7575 2914 212655 51809)
  195.40.36.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.37.0/24 (4608 7575 2914 212655 51809)
  195.40.37.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.36.0/24 (4608 7575 2914 212655 51809)
  195.40.38.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.39.0/24 (4608 7575 2914 212655 51809)
  195.40.39.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.38.0/24 (4608 7575 2914 212655 51809)
  195.40.40.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.41.0/24 (4608 7575 2914 212655 51809)
  195.40.41.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.40.0/24 (4608 7575 2914 212655 51809)
  195.40.42.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.43.0/24 (4608 7575 2914 212655 51809)
  195.40.43.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.42.0/24 (4608 7575 2914 212655 51809)
  195.40.44.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.45.0/24 (4608 7575 2914 212655 51809)
  195.40.45.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.44.0/24 (4608 7575 2914 212655 51809)
  195.40.46.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.47.0/24 (4608 7575 2914 212655 51809)
  195.40.47.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.46.0/24 (4608 7575 2914 212655 51809)
  195.40.48.0/21       4608 7575 2914 212655 51809 + Announce - aggregate of 195.40.48.0/22 (4608 7575 2914 212655 51809) and 195.40.52.0/22 (4608 7575 2914 212655 51809)
  195.40.48.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.49.0/24 (4608 7575 2914 212655 51809)
  195.40.49.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.48.0/24 (4608 7575 2914 212655 51809)
  195.40.50.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.51.0/24 (4608 7575 2914 212655 51809)
  195.40.51.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.50.0/24 (4608 7575 2914 212655 51809)
  195.40.52.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.53.0/24 (4608 7575 2914 212655 51809)
  195.40.53.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.52.0/24 (4608 7575 2914 212655 51809)
  195.40.54.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.55.0/24 (4608 7575 2914 212655 51809)
  195.40.55.0/24       4608 7575 2914 212655 51809 - Withdrawn - aggregated with 195.40.54.0/24 (4608 7575 2914 212655 51809)

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

AS51809   33 More Specifics   38 Total Advertisements   BRSK - BRSK Limited, GB
    31.98.72.0/21                 31.98.0.0/16
    31.98.80.0/20                 31.98.0.0/16
    45.41.148.0/22                45.41.128.0/18
    45.61.104.0/21                45.61.64.0/18
    88.97.160.0/21                88.97.0.0/16
    88.97.176.0/20                88.97.0.0/16
    104.238.40.0/21               104.238.32.0/19
    104.238.58.0/23               104.238.32.0/19
    104.238.62.0/23               104.238.32.0/19
    195.40.32.0/24                195.40.0.0/18
    195.40.33.0/24                195.40.0.0/18
    195.40.34.0/24                195.40.0.0/18
    195.40.35.0/24                195.40.0.0/18
    195.40.36.0/24                195.40.0.0/18
    195.40.37.0/24                195.40.0.0/18
    195.40.38.0/24                195.40.0.0/18
    195.40.39.0/24                195.40.0.0/18
    195.40.40.0/24                195.40.0.0/18
    195.40.41.0/24                195.40.0.0/18
    195.40.42.0/24                195.40.0.0/18
    195.40.43.0/24                195.40.0.0/18
    195.40.44.0/24                195.40.0.0/18
    195.40.45.0/24                195.40.0.0/18
    195.40.46.0/24                195.40.0.0/18
    195.40.47.0/24                195.40.0.0/18
    195.40.48.0/24                195.40.0.0/18
    195.40.49.0/24                195.40.0.0/18
    195.40.50.0/24                195.40.0.0/18
    195.40.51.0/24                195.40.0.0/18
    195.40.52.0/24                195.40.0.0/18
    195.40.53.0/24                195.40.0.0/18
    195.40.54.0/24                195.40.0.0/18
    195.40.55.0/24                195.40.0.0/18

Whois Entry

whois: 402625

IANA has recorded AS51809 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS51809\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 '31.98.72.0 - 31.98.79.255'
             
             % Abuse contact for '31.98.72.0 - 31.98.79.255' is 'abuse@wookra.com'
             
             inetnum:        31.98.72.0 - 31.98.79.255
             netname:        AS51809
             country:        GB
             geofeed:        https://geoip.wookra.com/geofeed.csv
             admin-c:        WL2349-RIPE
             tech-c:         WL2349-RIPE
             status:         ASSIGNED PA
             mnt-by:         lir-us-wookra-1-MNT
             created:        2025-09-24T03:02:51Z
             last-modified:  2025-10-05T18:09:00Z
             source:         RIPE
             
             %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)