Autonomous system
AS28580 Cilnet Comunicacao e Informatica S.A.
Unclassified LACNIC
Summary
FasterNet
residential isp cable brazil
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.brandmetroethernet.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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.217.114 |
| IX.br (PTT.br) Campinas | Campinas, Brazil | 200.192.108.1 |
Transit providers
7 upstream, 5 downstream and 24 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 37 prefixes · 77.82K addresses IPv6 9 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 46 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2005-01-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 6% valid · 12 valid, 198 with no ROA
- ROAs
- 1 authorising AS28580
- ASPA
- no ASPA record
- IRR
- 100% registered · 210 of 210 announcements
- Route objects
- 162 naming AS28580
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,782 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere