Report for 52561

Name

AS52561 - GFOUR TELECOM, BR

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.

52561 AS52561 - GFOUR TELECOM, BR

  Adjacency:     3  Upstream:     2  Downstream:     1
  Upstream Adjacent AS list
    AS264343        AS264343 - Empasoft Ltda .Me, BR
    AS274685        AS274685 - HS TELECOMUNICACAO E TECNOLOGIA LTDA, BR
  Downstream Adjacent AS list
    AS268570        AS268570 - YASUMITSU & YASUMITSU LTDA ME, BR

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
17342 AS52561        ORG+TRN Originate:       4096 /20.00  Transit:       2048 /21.00 AS52561 - GFOUR TELECOM, BR

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       %
13152 AS52561       AS52561 - GFOUR TELECOM, BR                        6      4      1      3      3  50.00%


  Prefix               AS Path                              Aggregation Suggestion
  177.86.76.0/22       4777 2516 6762 262355 274685 52561 52561 52561   
  177.86.76.0/23       4777 2516 6762 262355 274685 52561 52561 52561 - Withdrawn - matching aggregate 177.86.76.0/22 4777 2516 6762 262355 274685 52561 52561 52561
  177.86.78.0/23       4777 2516 6762 262355 274685 52561 52561 52561 - Withdrawn - matching aggregate 177.86.76.0/22 4777 2516 6762 262355 274685 52561 52561 52561
  186.227.120.0/22     4777 2516 6762 262355 264343 264343 264343 264343 52561   
  186.227.120.0/22     4777 2516 6762 262355 274685 52561 52561 52561 52561 52561 + Announce - aggregate of 186.227.120.0/23 (4777 2516 6762 262355 274685 52561 52561 52561 52561 52561) and 186.227.122.0/23 (4777 2516 6762 262355 274685 52561 52561 52561 52561 52561)
  186.227.120.0/23     4777 2516 6762 262355 274685 52561 52561 52561 52561 52561 - Withdrawn - aggregated with 186.227.122.0/23 (4777 2516 6762 262355 274685 52561 52561 52561 52561 52561)
  186.227.122.0/23     4777 2516 6762 262355 274685 52561 52561 52561 52561 52561 - Withdrawn - aggregated with 186.227.120.0/23 (4777 2516 6762 262355 274685 52561 52561 52561 52561 52561)

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

AS52561   4 More Specifics   6 Total Advertisements   AS52561 - GFOUR TELECOM, BR
    177.86.76.0/23                177.86.76.0/22
    177.86.78.0/23                177.86.76.0/22
    186.227.120.0/23              186.227.120.0/22
    186.227.122.0/23              186.227.120.0/22

Whois Entry

whois: 402617

IANA has recorded AS52561 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS52561\n             % IP Client: 2401:2000:6660::13
              % Copyright (c) Nic.br - Use of this data is governed by the Use and
             % Privacy Policy at https://registro.br/upp . Distribution,
             % commercialization, reproduction, and use for advertising or similar
             % purposes are expressly prohibited.
             % 2026-06-13T20:46:10-03:00 - 2401:2000:6660::13
             
             aut-num:     AS52561
             owner:       GFOUR TELECOM
             ownerid:     10.192.962/0001-43
             responsible: GFOUR TELECOM
             country:     BR
             owner-c:     GFTLM
             routing-c:   GFTLM
             abuse-c:     GFTLM
             created:     20130214
             changed:     20150504
             inetnum:     177.86.76.0/22
             inetnum:     186.227.120.0/22
             inetnum:     2804:e8c::/32
             
             nic-hdl-br:  GFTLM
             person:      G FOUR TELECOMUNICACOES LTDA - ME
             e-mail:      leandro@gfourtelecom.com.br
             country:     BR
             created:     20150504
             changed:     20260610
             
             % Security and mail abuse issues should also be addressed to cert.br,
             % respectivelly to cert@cert.br and mail-abuse@cert.br
             %
             % whois.registro.br only accepts exact match queries for domains,
             % registrants, contacts, tickets, providers, IPs, and ASNs.