Report for 21574

Name

AS21574 - Century Telecom Ltda, 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 AS6447) 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.

21574 Century Telecom Ltda, BR

  Adjacency:   104  Upstream:     9  Downstream:    95
  Upstream Adjacent AS list
    AS263444        Open X Tecnologia Ltda, BR
    AS3303          SWISSCOM Swisscom Switzerland Ltd, CH
    AS37100         SEACOM-AS, MU
    AS12552         IPO-EU, SE
    AS1031          PEER1-1031, US
    AS6939          HURRICANE, US
    AS7195          EDGEUNO S.A.S, CO
    AS16735         ALGAR TELECOM SA, BR
    AS3356          LEVEL3, US
  Downstream Adjacent AS list
    AS268327        K@NET PROVEDOR DE INTERNET, BR
    AS21433         ACCENTUREFSSC London DC, GB
    AS271488        REALDATA TELECOMUNICACOES E TECNOLOGIA LTDA, BR
    AS268843        CDNTV TECNOLOGIA LTDA, BR
    AS20044         SA ESTADO DE MINAS, BR
    AS264014        Led Internet Eireli, BR
    AS265424        Horizontes Telecom LTDA, BR
    AS264455        STAR MAN NET PROVEDORA DE INTERNET LTDA - EPP, BR
    AS267357        Livenet telecom, BR
    AS267070        Fibranet Juiz de Fora Servicos de Telecomunicacoes, BR
    AS268355        RESENDE & GONCALVES SERVICOS E INTERNET LTDA, BR
    AS272495        Star Telecomunicacoes LTDA, BR
    AS28572         Apoiocom Digital Ltda - EPP, BR
    AS28660         OPEN SYSTEM LTDA, BR
    AS52712         CONECTIVA INFORMATICA E TELECOMUNICACOES LTDA - ME, BR
    AS52631         ISP PROVERNET INFORMATICA LTDA - ME, BR
    AS52928         JANAJA SERVICOS LTDA, BR
    AS270564        MASTER DA WEB DATACENTER LTDA, BR
    AS263277        Rnet Informatica Ltda, BR
    AS266163        Itainet Fiber Provedor, BR
    AS264385        Itop Internet e Servicos LTDA, BR
    AS268229        VIA ONDAS TELECOMUNICACOES LTDA, BR
    AS270385        CONECTA - PROVEDOR DE INTERNET LTDA., BR
    AS270865        PW FIBRA OPTICA, BR
    AS270837        Imartech Fibra, BR
    AS270663        LM NET LTDA, BR
    AS272201        ACSNET TELECOM, BR
    AS271610        INFINITYCARD BRASIL LTDA, BR
    AS52875         M.I.MONTREAL INFORMATICA LTDA, BR
    AS61707         SYSVOIP TELECOMUNICACOES LTDA - ME, BR
    AS275646        --No Registry Entry--
    AS268433        MGCLOUD SOLUCOES EM TIC LTDA - ME, BR
    AS264421        BrumaNet Telecom, BR
    AS14789         CLOUDFLARENET-A, US
    AS262387        Intermicro Ltda, BR
    AS262306        Condax Tecnologia Ltda., BR
    AS262767        Avelino e Rodrigues LTDA, BR
    AS262674        Conquest Telecomunicacoes Ltda, BR
    AS262624        INETSAFE COMERCIO DE EQUIPAMENTOS ELETRONICOS LTDA, BR
    AS262566        Link Sete Servicos de Internet e Redes Ltda, BR
    AS262268        MAX NET TELECOMUNICACOES, BR
    AS263356        CNT Fiber, BR
    AS263302        TORPEDOLINK TELECOM, BR
    AS262948        LD Telecomunicacoes LTDA, BR
    AS263440        WAVE UP TELECOM BRASIL LTDA - ME, BR
    AS262895        Norte Line Telecomunicacoes Ltda., BR
    AS265051        Speed Max Provedor de Internet Wireless LTDA-ME, BR
    AS265497        AltaVista Telecomunicacoes LTDA, BR
    AS265460        LUP TELECOMUNICACOES LTDA, BR
    AS265437        INTERNET CORPORATE & SOLAR LTDA, BR
    AS266260        ITOP TELECOM LTDA - ME, BR
    AS266149        BDC TELECOM, BR
    AS264540        RG Tecnologia e Telecomunicacoes Ltda, BR
    AS264374        NCA Tecnologia Ltda, BR
    AS267536        NetFlux Internet, BR
    AS267497        GL TELECOM LTDA - ME, BR
    AS267008        NET WAY TECNOLOGIA LTDA, BR
    AS266942        NAVEGADOR INTERNET LTDA ME, BR
    AS270897        SAFE SMART TREINAMENTO CONSULTORIA E TELECOM LTDA, BR
    AS271049        Rede EXS Telecomunicacoes LTDA, BR
    AS271062        RL MultiFibra Internet, BR
    AS270951        PAULO MARQUES DE ARAUJO - ME, BR
    AS271338        TITAM NET TELECOM, BR
    AS272241        LIBERT TECNOLOGIA EM TELECOMUNICACOES EIRELI, BR
    AS272479        ERNESSON RODRIGUES LTDA, BR
    AS271398        FACILITUDE SERVICOS DE COMUNICAO LTDA, BR
    AS272753        FASTNET FIBRA, BR
    AS272487        WAVE - FIBRA TELECOMUNICACOES LTDA, BR
    AS271251        LAR NET TELECOMUNICACOES LTDA, BR
    AS271072        ULTRAFIBRA NET REPRESENTACOES TELECOM EIRELI, BR
    AS273590        PVN Provedor De Internet LTDA, BR
    AS273350        Gns Telecom, BR
    AS273663        NT FIBRA, BR
    AS269248        WAGNER JOSE RIBEIRO, BR
    AS269199        INFOTEC TELECON LTDA, BR
    AS269084        Global Tech Telecom Ltda - ME, BR
    AS268882        Mais Rede Telecom, BR
    AS268725        Planex Telecom, BR
    AS268188        ROBSON LIMA DA SILVA PROVEDOR DE INTERNET LTDA, BR
    AS267978        JOTA NET TELECOMUNICACOES LTDA - ME, BR
    AS263475        Guara Digital LTDA, BR
    AS28590         Directnet Prestacao de Servicos Ltda., BR
    AS28296         Acessa Telecomunicacoes Ltda, BR
    AS28175         On Line Tecnologia e Integracao LTDA - EPP, BR
    AS28133         Provedor Eloinet Ltda, BR
    AS274798        --No Registry Entry--
    AS52907         PRIME FIBRA LTDA, BR
    AS53077         ALOLTECH TELECOM LTDA, BR
    AS52916         Datanet Provedor de Internet Ltda, BR
    AS53139         RDF Informatica Ltda, BR
    AS53196         NETSTAR SOLUCOES LTDA, BR
    AS52532         Speednet Telecomunicacoes Ltda ME, BR
    AS61945         PIX BRASIL NETWORKS LTDA, BR
    AS61712         YUPNET TELECOMUNICACOES LTDA, BR
    AS274795        --No Registry Entry--

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
8731  AS21574        ORG+TRN Originate:      13568 /18.27  Transit:     170752 /14.62 Century Telecom Ltda, 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       %
36029 AS21574       Century Telecom Ltda, BR                           5      0      0      5      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  168.227.200.0/22     6939 21574             
  186.249.224.0/20     6939 21574             
  187.1.176.0/20       6939 21574             
  187.1.178.0/24       37100 21574            
  200.169.0.0/20       6939 21574             

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

AS21574   1 More Specifics   5 Total Advertisements   Century Telecom Ltda, BR
    187.1.178.0/24                187.1.176.0/20

Whois Entry

whois: 402609

IANA has recorded AS21574 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS21574\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.
             % 2026-06-11T20:28:01-03:00 - 2401:2000:6660::13
             
             aut-num:     AS21574
             owner:       Century Telecom Ltda
             ownerid:     01.492.641/0001-73
             responsible: Fernando Antonio Barbosa
             country:     BR
             owner-c:     DCT38
             routing-c:   DCT38
             abuse-c:     ACTLT99
             created:     20010607
             changed:     20200610
             inetnum:     200.169.0.0/20
             inetnum:     187.1.176.0/20
             inetnum:     186.249.224.0/20
             inetnum:     2804:23ec::/32
             inetnum:     168.227.200.0/22
             as-in:       from AS262306 300 accept AS262306
             as-in:       from AS264552 300 accept AS264552
             as-in:       from AS262805 300 accept AS262805
             as-in:       from AS262566 300 accept AS262566
             as-in:       from AS52596 300 accept AS52596
             as-in:       from AS263632 300 accept AS263632
             as-in:       from AS264421 300 accept AS264421
             as-in:       from AS264228 300 accept AS264228
             as-in:       from AS262525 300 accept AS262525
             as-in:       from AS52809 300 accept AS52809
             as-in:       from AS61707 300 accept AS61707
             as-in:       from AS52883 300 accept AS52883
             as-in:       from AS264540 300 accept AS264540
             as-in:       from AS262624 300 accept AS262624
             as-in:       from AS52947 300 accept AS52947
             as-in:       from AS263453 300 accept AS263453
             as-in:       from AS262961 300 accept AS262961
             as-in:       from AS263666 300 accept AS263666
             as-in:       from AS265185 300 accept AS265185
             as-in:       from AS52758 300 accept AS52758
             as-in:       from AS264325 300 accept AS264325
             as-in:       from AS262336 300 accept AS262336
             as-in:       from AS262602 300 accept AS262602
             as-in:       from AS263432 300 accept AS263432
             as-in:       from AS52596 300 accept AS52596
             as-out:      to AS3549 announce AS21574
             as-out:      to AS16735 announce AS21574
             as-out:      to AS262589 announce AS21574
             as-out:      to AS28360 announce AS21574
             
             nic-hdl-br:  DCT38
             person:      Dominios Corporativos Century Telecom
             e-mail:      fapesp@century.net.br
             country:     BR
             created:     20040624
             changed:     20181206
             
             nic-hdl-br:  ACTLT99
             person:      Abuse Century Telecom Ltda
             e-mail:      abuse@century.net.br
             country:     BR
             created:     20200610
             changed:     20200610
             
             % Security and mail abuse issues should also be addressed to cert.br,
             % respectivelly to cert@cert.br and mail-abuse@cert.br
             %
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             % registrants, contacts, tickets, providers, IPs, and ASNs.