Autonomous system
AS28130 CERTTO TELECOMUNICACOES LTDA EPP.
Residential LACNIC
Summary
Certto Telecomunicações
isp residential brazil cable
AS28130 is operated by Certto Telecomunicações.
What it's used for
- The address space carries residential user traffic, evidenced by reverse DNS records consistently using the
users.certto.com.brsuffix across all sampled prefixes. - The AS announces 13,312 IPv4 addresses across 6 prefixes and maintains 34 observed neighbours, a ratio indicative of a regional access provider rather than a transit carrier.
Notable
- All available RDAP registrants match the AS holder, specifically listing
CERTTO TELECOMUNICAÇÕES LTDA EPP.for the largest blocks. - The inventory consists of six distinct IPv4 prefixes ranging from /20 to /22 sizes, alongside two /32 IPv6 prefixes, reflecting a standard regional ISP footprint.
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 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.212.240 |
| IX.br (PTT.br) Curitiba | Curitiba, Brazil | 45.184.146.31 |
| IX.br (PTT.br) Cascavel | Cascavel, Brazil | 45.227.3.5 |
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 6 prefixes · 13.31K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 8 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2008-12-30
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 99 valid, 0 with no ROA
- ROAs
- 9 authorising AS28130
- ASPA
- no ASPA record
- IRR
- 100% registered · 99 of 99 announcements
- Route objects
- 22 naming AS28130
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