Autonomous system
AS28209 Under Servicos de Internet Ltda
Hosting LACNIC Content
Summary
Under
residential isp brazil broadband
AS28209 is operated by Under, a Brazilian internet service provider.
What it's used for
- The address space carries residential and business broadband traffic, evidenced by reverse DNS entries such as
none.underplatform.comandf1215abf95.underplatform.com. - The AS announces 20,480 IPv4 addresses across 19 prefixes and 8 IPv6 prefixes, while maintaining 33 observed neighbours; this ratio of moderate address space to a significant number of peering partners suggests a regional access network with substantial transit and peering relationships.
Notable
- All registrants in the RDAP data match the announcer, consistently listing
Under Servicos de Internet Ltdafor netnames212854,167887, and113587. - The address inventory is finely subdivided into /21, /22, /23, and /24 blocks across the 177.70.0.0/16, 179.127.0.0/16, and 189.113.0.0/16 ranges, indicating site-by-site segmentation typical of a large ISP managing distinct customer pools or regional hubs.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| IX.br (PTT.br) São Paulo | São Paulo, Brazil | 187.16.208.116 |
Transit providers
7 upstream, 3 downstream and 14 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 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 19 prefixes · 20.48K addresses IPv6 8 prefixes
| Country | Name | Prefixes |
|---|---|---|
| BR | Brazil | 27 |
Registry
Allocation record
- Registry
- LACNIC
- Registered
- 2008-05-08
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Under
- Also known as
- Under
- Network type
- Content
- Scope
- South America
- Traffic ratio
- Heavy Outbound
- Peering policy
- Open
- IRR as-set
ALTDB::AS-UNDER- Present at
- 1 exchanges
- Facilities
- 1 facilities
- Website
- https://www.under.com.br
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 96% valid · 49 valid, 2 with no ROA
- ROAs
- 4 authorising AS28209
- ASPA
- no ASPA record
- IRR
- 100% registered · 51 of 51 announcements
- Route objects
- 24 naming AS28209
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,783 prefixes, as published 2026-10-17. 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