AS21574 — Century Telecom Ltda

AS21574 announces 4 IPv4 prefixes covering 13,312 addresses and 1 IPv6 prefixes.

About this network

AS21574 is operated by Century Telecom Ltda.

What it's used for

• The address space carries residential and business internet access, evidenced by reverse DNS records pointing to centurytelecom.net.br and specific subnets like rede-precon.centurytelecom.net.br.
• The AS announces 13,312 IPv4 addresses across 8 prefixes and 1 IPv6 prefix, while maintaining 249 observed neighbours. This high neighbour count relative to the address inventory indicates a role focused on transit and peering for a regional Brazilian ISP.

Notable

• All registrants for the announced prefixes are listed as Century Telecom Ltda, matching the AS holder name.
• The address inventory is composed of multiple /20, /21, /22, /23, and /24 blocks, with the largest being 186.249.224.0/20 and 200.169.0.0/20.
• The network has been observed in routing tables since 2001-06-15.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 168.227.200.0/22
• 186.249.224.0/20
• 187.1.176.0/20
• 200.169.0.0/20
• 2804:23ec::/32

Upstream networks

• AS7195 EDGEUNO S.A.S
• AS263444 Open X Tecnologia Ltda
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS1031 PEER 1031 LLC
• AS267613 ELETRONET S.A.
• AS24482 SG.GS
• AS34549 meerfarbig GmbH & Co. KG
• AS3303 Swisscom (Schweiz) AG
• AS22652 Videotron Ltee
• AS29632 Netassist International EOOD
• AS213241 TECHIT.BE SRL
• AS48362 Stadtwerke Feldkirch
• AS34019 Hivane Association
• AS212024 Marc Schmitt
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.
• AS20485 Joint Stock Company TransTeleCom
• AS17639 Converge ICT Solutions Inc.
• AS37100 SEACOM Limited
• AS293 ESnet
• AS57463 NetIX Communications JSC
• AS31027 GlobalConnect A/S
• AS37721 Virtual Technologies & Solutions
• AS1836 green.ch AG
• AS33891 Core-Backbone GmbH

Downstream networks

• AS53139 RDF Informatica Ltda
• AS263356 CNT Fiber
• AS61707 SYSVOIP TELECOMUNICACOES LTDA - ME
• AS271338 TITAM NET TELECOM
• AS262566 Link Sete Servicos de Internet e Redes Ltda
• AS263277 Rnet Informatica Ltda
• AS270564 MASTER DA WEB DATACENTER LTDA
• AS262387 Intermicro Ltda
• AS61712 YUPNET TELECOMUNICACOES LTDA
• AS262674 Conquest Telecomunicacoes Ltda
• AS262624 INETSAFE COMERCIO DE EQUIPAMENTOS ELETRONICOS LTDA
• AS269199 INFOTEC TELECON LTDA
• AS267070 Fibranet Juiz de Fora Servicos de Telecomunicacoes
• AS52928 NORTETEL TELECOMUNICACOES LTDA
• AS20044 S/A ESTADO DE MINAS
• AS271610 INFINITYCARD BRASIL LTDA
• AS270897 SAFE SMART TREINAMENTO CONSULTORIA E TELECOM LTDA
• AS52532 Speednet Telecomunicacoes Ltda ME
• AS264421 BrumaNet Telecom
• AS268188 ATIVA TELECOM LTDA
• AS271062 Nextlink telecom
• AS52712 CONECTIVA INFORMATICA E TELECOMUNICACOES LTDA - ME
• AS264374 NCA Tecnologia Ltda
• AS265460 LUP TELECOMUNICACOES LTDA
• AS265051 Speed Max Provedor de Internet Wireless LTDA-ME

Adjacent networks

• AS263444 Open X Tecnologia Ltda
• AS7195 EDGEUNO S.A.S
• AS3356 Level 3 Parent, LLC
• AS52928 NORTETEL TELECOMUNICACOES LTDA
• AS6939 Hurricane Electric LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS61712 YUPNET TELECOMUNICACOES LTDA
• AS53139 RDF Informatica Ltda
• AS267613 ELETRONET S.A.
• AS22652 Videotron Ltee
• AS263356 CNT Fiber
• AS1031 PEER 1031 LLC
• AS262566 Link Sete Servicos de Internet e Redes Ltda
• AS52532 Speednet Telecomunicacoes Ltda ME
• AS271338 TITAM NET TELECOM
• AS61707 SYSVOIP TELECOMUNICACOES LTDA - ME
• AS262387 Intermicro Ltda
• AS34019 Hivane Association
• AS17639 Converge ICT Solutions Inc.
• AS212024 Marc Schmitt
• AS263277 Rnet Informatica Ltda
• AS270564 MASTER DA WEB DATACENTER LTDA
• AS269084 Global Tech Telecom Ltda - ME
• AS273663 NT FIBRA
• AS37100 SEACOM Limited

Internet exchanges

• IX.br (PTT.br) São Paulo — São Paulo, Brazil
• DE-CIX Frankfurt — Frankfurt, Germany
• IX.br (PTT.br) Fortaleza — Fortaleza, Brazil
• IX.br (PTT.br) Porto Alegre — Porto Alegre, Brazil
• DE-CIX New York — New York, United States
• IX.br (PTT.br) Curitiba — Curitiba, Brazil
• IX.br (PTT.br) Florianópolis — Florianópolis, Brazil
• IX.br (PTT.br) Belo Horizonte — Belo Horizonte, Brazil
• IX.br (PTT.br) Campinas — Campinas, Brazil