Autonomous system
AS53139 RDF Informatica Ltda
Residential LACNIC
Summary
RDF Telecom
isp residential brazil cable
AS53139 is operated by RDF Informatica Ltda, known commercially as RDF Telecom.
What it's used for
- The address space carries residential and business subscriber traffic, evidenced by reverse DNS entries pointing to
rdfnet.com.br(e.g.,187-109-84-0.rdfnet.com.br). - The network announces 5,120 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 26 upstream or peer neighbours. This ratio of moderate address space to a significant number of connections indicates a regional access provider rather than a transit carrier.
- As a cable and DSL ISP, the traffic consists primarily of end-user internet access, including web browsing, streaming, and VoIP services for households and local businesses in Brazil.
Notable
- Both announced prefixes (
187.109.80.0/20and168.197.204.0/22) listRDF Informatica Ltdaas the registrant, matching the AS holder. - The inventory is composed of two distinct IPv4 blocks and a single /32 IPv6 prefix, all located in Brazil.
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 | 187.16.221.90 |
| IX.br (PTT.br) Belo Horizonte | Belo Horizonte, Brazil | 200.219.139.28 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 5.12K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 3 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2010-04-16
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 39 valid, 0 with no ROA
- ROAs
- 3 authorising AS53139
- ASPA
- no ASPA record
- IRR
- 100% registered · 39 of 39 announcements
- Route objects
- 36 naming AS53139
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 440 networks and 1,773 prefixes, as published 2026-10-13. 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