Autonomous system
AS53112 SULNET TELECOM
Unclassified RIPE
Summary
Sulnet
residential isp cable dsl
SULNET TELECOM is the AS handle for Sulnet, a regional telecommunications provider based in Santa Rosa, Rio Grande do Sul.
What it's used for
- The address space carries residential broadband traffic, evidenced by reverse DNS entries such as
187-109-23-255.dynamic.sulnet.net.brandcgnat-138-97-5-0.sulnet.net.br. - The network announces 13,312 IPv4 addresses across 6 prefixes and 23 IPv6 prefixes, while maintaining only 8 observed neighbours, a ratio characteristic of an access network rather than a transit provider.
- Traffic consists of subscriber eyeballs for cable and DSL services, with CGNAT usage indicating carrier-grade NAT deployment for residential customers.
Notable
- All registrants for the announced prefixes are listed as
SULNET TELECOM, matching the AS holder. - The address inventory is subdivided into six distinct IPv4 blocks, including two /20s and four /22s, alongside a fragmented IPv6 allocation under the 2804:d0c::/34 space.
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 | 187.16.221.148 |
| IX.br (PTT.br) Porto Alegre | Porto Alegre, Brazil | 177.52.39.41 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 6 prefixes · 13.31K addresses IPv6 23 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 29 |
Registry
Allocation record
- Registry
- RIPE
- Handle
53112- Registry name
- ASN53112
- Registrant
- SULNET TELECOM
- Abuse contact
- ZILIONET TELECOMUNICAÇÕES LTDA
- Registered
- 2009-12-11
- Last changed
- 2024-11-07
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 10 valid, 0 with no ROA
- ROAs
- 10 authorising AS53112
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 9 naming AS53112
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: 431 networks and 1,775 prefixes, as published 2026-10-11. 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