AS28580 — Cilnet Comunicacao e Informatica S.A.

AS28580 announces 25 IPv4 prefixes covering 77,824 addresses and 9 IPv6 prefixes.

About this network

AS28580 is operated by Cilnet Comunicação e Informática S.A., widely known as FasterNet.

What it's used for

• The address space carries residential and metro-ethernet customer traffic, evidenced by reverse DNS entries such as clientes.cilnet.com.br and metroethernet.dynamic.fst.sp.faster.net.br.
• With 77,824 IPv4 addresses announced across 37 prefixes and 36 observed neighbours, the ratio indicates a regional access provider rather than a transit hub.

Notable

• Registrants for the available prefixes consistently list Cilnet Comunicação e Informática S.A., matching the AS holder.
• The operator is identified in peering databases as FasterNet, a cable/DSL ISP with regional scope in Brazil.
• The inventory includes a mix of /18, /19, /20, and /22 blocks, alongside a /32 IPv6 allocation, reflecting a diverse but consolidated address estate.

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

Announced prefixes

• 45.7.204.0/22
• 45.166.124.0/22
• 45.170.140.0/22
• 45.224.76.0/22
• 45.237.16.0/22
• 138.0.180.0/22
• 138.122.68.0/22
• 138.186.180.0/22
• 143.0.232.0/22
• 168.90.184.0/22
• 168.194.4.0/22
• 168.194.228.0/22
• 170.245.20.0/22
• 170.247.116.0/22
• 177.85.40.0/22
• 177.101.48.0/20
• 186.224.128.0/18
• 187.45.0.0/19
• 187.84.0.0/20
• 189.28.224.0/19
• 189.51.208.0/20
• 191.253.240.0/20
• 200.187.80.0/20
• 201.46.32.0/19
• 201.150.100.0/22
• 2804:90::/32
• 2804:5f4:c001::/48
• 2804:5f4:c002::/47
• 2804:5f4:c011::/48
• 2804:5f4:c012::/47
• 2804:5f4:c021::/48
• 2804:5f4:c022::/47
• 2804:5f4:c031::/48
• 2804:5f4:c032::/47

Upstream networks

• AS6939 Hurricane Electric LLC
• AS37468 Angola Cables
• AS3356 Level 3 Parent, LLC
• AS28649 Desktop Sigmanet Comunicacao Multimidia SA
• AS24482 SG.GS
• AS57463 NetIX Communications JSC
• AS35280 F5 Networks SARL
• AS37721 Virtual Technologies & Solutions

Downstream networks

• AS266462 SW Telecomunicacoes e Informatica Itu Ltda. - ME
• AS61855 NOVA NET TECNOLOGIA LTDA - ME
• AS268989 MULTTV CONSULTORIA E LOCACOES DE EQUIPAMENTOS S.A.
• AS52887 Associacao Torre de Vigia de Biblias e Tratados
• AS273335 Johnny Frank Varas ME

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS37468 Angola Cables
• AS3356 Level 3 Parent, LLC
• AS266462 SW Telecomunicacoes e Informatica Itu Ltda. - ME
• AS28649 Desktop Sigmanet Comunicacao Multimidia SA
• AS61855 NOVA NET TECNOLOGIA LTDA - ME
• AS268989 MULTTV CONSULTORIA E LOCACOES DE EQUIPAMENTOS S.A.
• AS24482 SG.GS
• AS57463 NetIX Communications JSC
• AS35280 F5 Networks SARL
• AS37721 Virtual Technologies & Solutions
• AS52887 Associacao Torre de Vigia de Biblias e Tratados
• AS273335 Johnny Frank Varas ME

Internet exchanges

• IX.br (PTT.br) São Paulo — São Paulo, Brazil
• IX.br (PTT.br) Campinas — Campinas, Brazil