Report for 263356

Name

AS263356 - CNT Fiber, 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.

263356 AS263356 - CNT Fiber, BR

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS21574         AS21574 - Century Telecom Ltda, BR
    AS23106         AS23106 - AMERICAN TOWER DO BRASIL-COMUNICACAO MULTIMIDIA LT, BR

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
12115 AS263356       ORIGIN  Originate:       8192 /19.00  Transit:          0 /0.00  AS263356 - CNT Fiber, 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       %
 4131 AS263356      AS263356 - CNT Fiber, BR                          15     13      0      2     13  86.67%


  Prefix               AS Path                              Aggregation Suggestion
  191.37.72.0/21       4608 7575 7195 23106 263356   
  191.37.72.0/22       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.72.0/23       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.72.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.73.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.74.0/23       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.74.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.75.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.76.0/22       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.76.0/23       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.76.0/24       4608 7575 7195 21574 263356   
  191.37.77.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.78.0/23       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.78.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356
  191.37.79.0/24       4608 7575 7195 23106 263356 - Withdrawn - matching aggregate 191.37.72.0/21 4608 7575 7195 23106 263356

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

AS263356   14 More Specifics   15 Total Advertisements   AS263356 - CNT Fiber, BR
    191.37.72.0/22                191.37.72.0/21
    191.37.72.0/23                191.37.72.0/21
    191.37.72.0/24                191.37.72.0/21
    191.37.73.0/24                191.37.72.0/21
    191.37.74.0/23                191.37.72.0/21
    191.37.74.0/24                191.37.72.0/21
    191.37.75.0/24                191.37.72.0/21
    191.37.76.0/22                191.37.72.0/21
    191.37.76.0/23                191.37.72.0/21
    191.37.76.0/24                191.37.72.0/21
    191.37.77.0/24                191.37.72.0/21
    191.37.78.0/23                191.37.72.0/21
    191.37.78.0/24                191.37.72.0/21
    191.37.79.0/24                191.37.72.0/21

Whois Entry

whois: 402617

IANA has recorded AS263356 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS263356\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.
             % 2026-06-13T22:56:01-03:00 - 2401:2000:6660::13
             
             aut-num:     AS263356
             owner:       CNT Fiber
             ownerid:     08.892.029/0001-37
             responsible: Amarildo Souza Arruda
             country:     BR
             owner-c:     AMSAR103
             routing-c:   CNILT14
             abuse-c:     CNILT14
             created:     20140318
             changed:     20140318
             inetnum:     191.37.72.0/21
             inetnum:     2804:14e0::/32
             
             nic-hdl-br:  AMSAR103
             person:      Amarildo de Souza Arruda
             e-mail:      amarildosarruda@gmail.com
             country:     BR
             created:     20241125
             changed:     20241126
             
             nic-hdl-br:  CNILT14
             person:      Conecta Net Informatica Ltda
             e-mail:      diretoria@cntfiber.com.br
             country:     BR
             created:     20111006
             changed:     20260317
             
             % 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.