Autonomous system
AS28198 SEMPRE TELECOMUNICACOES LTDA
Residential AFRINIC
Summary
Sempre Internet
residential isp cable dsl
AS28198 is operated by Sempre Telecomunicações Ltda, a Brazilian cable and DSL internet service provider.
What it's used for
- The address space carries residential and business customer traffic, evidenced by reverse DNS records consistently pointing to
sempre.tec.br(e.g.,177-130-68-0.sempre.tec.br). - The AS announces 68,352 IPv4 addresses across 50 prefixes and 60 IPv6 prefixes, while maintaining 171 observed routing neighbours. This high neighbour count relative to the address inventory indicates a role focused on peering and transit exchange rather than pure internal corporate segmentation.
Notable
- All sampled registrants for the largest prefixes are listed as
SEMPRE TELECOMUNICACOES LTDA, matching the AS holder and confirming consistent ownership of the announced space. - The inventory consists of a mix of /20, /21, and /22 IPv4 blocks, primarily in the 177.0.0.0/8, 186.0.0.0/8, and 187.0.0.0/8 ranges, alongside an IPv6 allocation under
2804:c90::/37.
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 5 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.213.140 |
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.194.224 |
| IX.br (PTT.br) Fortaleza | Fortaleza, Brazil | 45.68.74.47 |
| DE-CIX New York | New York, United States | 206.82.104.250 |
| IX.br (PTT.br) Belo Horizonte | Belo Horizonte, Brazil | 200.219.139.192 |
Transit providers
21 upstream, 45 downstream and 121 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 46 prefixes · 68.61K addresses IPv6 60 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 106 |
Registry
Allocation record
- Registry
- AFRINIC
- Handle
28198- Registry name
- ASN28198
- Registrant
- SEMPRE TELECOMUNICACOES LTDA
- Abuse contact
- soc@sempre.net.br
- Registered
- 2008-04-02
- Last changed
- 2023-09-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 361 valid, 0 with no ROA
- ROAs
- 32 authorising AS28198
- ASPA
- no ASPA record
- IRR
- 100% registered · 361 of 361 announcements
- Route objects
- 530 naming AS28198
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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