Report for 21369

Name

SEMA-UK-AS, 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 AS4637) 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.

21369 SEMA-UK-AS SchlumbergerSema

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS1273    CW Cable & Wireless
    AS2529    DEMON-INTERNET Demon Internet
    AS3549    GBLX Global Crossing Ltd.

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
8764  AS21369  ORIGIN  Originate:       5120 /19.68  Transit:          0 /0.00  SEMA-UK-AS SchlumbergerSema

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       %
 2628 AS21369 SEMA-UK-AS SchlumbergerSema                  14      6      2     10      4  28.57%


  Prefix               AS Path                              Aggregation Suggestion
  157.203.40.0/22      4637 3549 21369        
  157.203.41.0/24      4637 1273 21369        
  157.203.42.0/24      4637 3549 21369      - Withdrawn - matching aggregate 157.203.40.0/22 4637 3549 21369
  157.203.43.0/24      4637 1273 21369        
  157.203.50.0/23      4637 3549 21369        
  157.203.50.0/24      4637 3549 21369      - Withdrawn - matching aggregate 157.203.50.0/23 4637 3549 21369
  157.203.51.0/24      4637 1273 21369        
  157.203.242.0/23     4637 2529 21369        
  157.203.242.0/23     4637 1273 21369      + Announce - aggregate of 157.203.242.0/24 (4637 1273 21369) and 157.203.243.0/24 (4637 1273 21369)
  157.203.242.0/24     4637 1273 21369      - Withdrawn - aggregated with 157.203.243.0/24 (4637 1273 21369)
  157.203.243.0/24     4637 1273 21369      - Withdrawn - aggregated with 157.203.242.0/24 (4637 1273 21369)
  193.201.120.0/23     4637 3549 21369        
  193.201.120.0/23     4637 1273 21369      + Announce - aggregate of 193.201.120.0/24 (4637 1273 21369) and 193.201.121.0/24 (4637 1273 21369)
  193.201.120.0/24     4637 1273 21369      - Withdrawn - aggregated with 193.201.121.0/24 (4637 1273 21369)
  193.201.121.0/24     4637 1273 21369      - Withdrawn - aggregated with 193.201.120.0/24 (4637 1273 21369)
  193.201.160.0/24     4637 1273 21369        

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

AS21369   12 More Specifics   14 Total Advertisements   SEMA-UK-AS SchlumbergerSema
    157.203.40.0/22               157.203.0.0/16
    157.203.41.0/24               157.203.0.0/16
    157.203.42.0/24               157.203.0.0/16
    157.203.43.0/24               157.203.0.0/16
    157.203.50.0/23               157.203.0.0/16
    157.203.50.0/24               157.203.0.0/16
    157.203.51.0/24               157.203.0.0/16
    157.203.242.0/23              157.203.0.0/16
    157.203.242.0/24              157.203.0.0/16
    157.203.243.0/24              157.203.0.0/16
    193.201.120.0/24              193.201.120.0/23
    193.201.121.0/24              193.201.120.0/23

Whois Entry

whois: 402332

IANA has recorded AS21369 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.net -r "AS21369\n             % [whois.apnic.net]
             % Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html
             
             %ERROR:101: no entries found
             %
             % No entries found in source APNIC,JPNIC,KRNIC,TWNIC,IDNIC,IRINN-GRS.
             
             % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU5)