Autonomous system
AS28158 Ampernet Telecomunicacoes Ltda
Unclassified LACNIC
Summary
Ampernet
residential isp brazil access
AS28158 is operated by Ampernet Telecomunicacoes Ltda, a regional internet service provider in Brazil.
What it's used for
- The address space carries dynamic residential connections, evidenced by reverse DNS entries such as
0.100.109.187.dynamic.ampernet.com.brand255.103.109.187.dynamic.ampernet.com.br. - The AS announces 24,576 IPv4 addresses across 24 prefixes and 2 IPv6 prefixes, while maintaining 68 observed neighbours. This ratio of moderate address space against a high number of peering partners indicates an access network providing last-mile connectivity rather than a transit provider.
Notable
- All RDAP registrants for the largest prefixes are listed as
Ampernet Telecomunicações Ltda, which aligns perfectly with the AS holder name. - The inventory consists of a mix of /20, /21, /22, /23, and /24 blocks, including ranges in the 187.109.0.0/16, 177.23.0.0/16, and 45.0.0.0/8 spaces, reflecting a typical 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 5 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.217.14 |
| IX.br (PTT.br) Curitiba | Curitiba, Brazil | 45.184.146.7 |
| IX.br (PTT.br) Maringá | Maringá, Brazil | 187.16.201.88 |
| IX.br (PTT.br) Cascavel | Cascavel, Brazil | 45.227.3.14 |
| IX.br (PTT.br) Foz do Iguaçu | Foz do Iguaçu, Brazil | 187.16.204.6 |
Transit providers
8 upstream, 34 downstream and 71 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 22 prefixes · 25.60K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 25 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2009-05-08
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 92% valid · 71 valid, 6 with no ROA
- ROAs
- 20 authorising AS28158
- ASPA
- no ASPA record
- IRR
- 100% registered · 77 of 77 announcements
- Route objects
- 37 naming AS28158
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