Report for 43037

Name

SEZNAM-, CZ

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.

43037 SEZNAM-, CZ

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS29208         QUANTCOM-AS Quantcom a.s., CZ
  Downstream Adjacent AS list
    AS200600        SEZNAM-CZ-DC, CZ

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
19825 AS43037        ORG+TRN Originate:       3072 /20.42  Transit:       1024 /22.00 SEZNAM-, CZ

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       %
10131 AS43037       SEZNAM-, CZ                                        6      5      1      2      4  66.67%


  Prefix               AS Path                              Aggregation Suggestion
  77.75.72.0/21        4777 2497 3257 29208 43037 + Announce - aggregate of 77.75.72.0/22 (4777 2497 3257 29208 43037) and 77.75.76.0/22 (4777 2497 3257 29208 43037)
  77.75.72.0/23        4777 2497 3257 29208 43037 - Withdrawn - aggregated with 77.75.74.0/23 (4777 2497 3257 29208 43037)
  77.75.74.0/24        4777 2497 3257 29208 43037 - Withdrawn - aggregated with 77.75.75.0/24 (4777 2497 3257 29208 43037)
  77.75.75.0/24        4777 2497 3257 29208 43037 - Withdrawn - aggregated with 77.75.74.0/24 (4777 2497 3257 29208 43037)
  77.75.76.0/23        4777 2497 3257 29208 43037 - Withdrawn - aggregated with 77.75.78.0/23 (4777 2497 3257 29208 43037)
  77.75.78.0/23        4777 2497 3257 29208 43037 - Withdrawn - aggregated with 77.75.76.0/23 (4777 2497 3257 29208 43037)
  185.66.188.0/22      4777 2497 3257 29208 43037   

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

AS43037   5 More Specifics   6 Total Advertisements   SEZNAM-, CZ
    77.75.72.0/23                 77.75.72.0/21
    77.75.74.0/24                 77.75.72.0/21
    77.75.75.0/24                 77.75.72.0/21
    77.75.76.0/23                 77.75.72.0/21
    77.75.78.0/23                 77.75.72.0/21

Whois Entry

whois: 402332

IANA has recorded AS43037 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS43037\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 'AS42961 - AS43073'
             
             as-block:       AS42961 - AS43073
             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:        2023-12-11T15:09:58Z
             last-modified:  2023-12-11T15:09:58Z
             source:         RIPE
             
             % Information related to 'AS43037'
             
             % Abuse contact for 'AS43037' is 'abuse@seznam.cz'
             
             aut-num:        AS43037
             as-name:        SEZNAM-CZ
             org:            ORG-Sa508-RIPE
             import:         from AS9148 accept ANY
             import:         from AS5610 accept ANY
             export:         to AS9148 announce AS43037
             export:         to AS5610 announce AS43037
             export:         to AS5610 announce AS200600
             admin-c:        SZN5-RIPE
             tech-c:         SZN5-RIPE
             status:         ASSIGNED
             mnt-by:         RIPE-NCC-END-MNT
             mnt-by:         SEZNAM-MNT
             created:        2007-05-29T08:00:03Z
             last-modified:  2017-11-15T09:48:45Z
             source:         RIPE
             
             organisation:   ORG-SA508-RIPE
             org-name:       Seznam.cz, a.s.
             country:        CZ
             org-type:       LIR
             address:        Radlicka 3294/10
             address:        15000
             address:        Prague 5
             address:        CZECH REPUBLIC
             phone:          +420234694111
             fax-no:         +420234694115
             reg-nr:         26168685
             admin-c:        PZ172-RIPE
             admin-c:        FEIX-RIPE
             abuse-c:        AD10910-RIPE
             mnt-ref:        RIPE-NCC-HM-MNT
             mnt-ref:        SEZNAM-MNT
             mnt-by:         RIPE-NCC-HM-MNT
             mnt-by:         SEZNAM-MNT
             created:        2007-05-01T10:11:05Z
             last-modified:  2026-04-29T05:30:36Z
             source:         RIPE # Filtered
             
             role:           Seznam.cz IT department
             address:        Radlicka 3294/10 150 00 Prague 5 Czech Republic
             phone:          +420 602 126 570
             abuse-mailbox:  abuse@seznam.cz
             admin-c:        PZ172-RIPE
             tech-c:         SZN11-RIPE
             tech-c:         SZN10-RIPE
             nic-hdl:        SZN5-RIPE
             mnt-by:         SEZNAM-MNT
             created:        2007-05-06T15:50:27Z
             last-modified:  2015-07-03T13:19:00Z
             source:         RIPE # Filtered
             
             % This query was served by the RIPE Database Query Service version 1.122 (BUSA)