asn.dev

Autonomous system

AS28581 Banco Santander Brasil S.A.

Unclassified ARIN

IPv4 addresses 4.10K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly BR
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Banco Santander (Brasil) S.A.

Brazil · AI-generated

banking corporate internal

AS28581 is operated by Banco Santander (Brasil) S.A.

What it's used for

  • The address space is registered under the netname 49591 for the bank, indicating a dedicated corporate estate rather than a public access network.
  • The AS announces a single IPv4 prefix, 200.220.176.0/20, totaling 4096 addresses, with 0 IPv6 prefixes.
  • With only 2 observed neighbours, the low neighbour count relative to the address block suggests an internal corporate network with limited external peering, consistent with a large enterprise managing its own infrastructure.

Notable

  • The RDAP registrant Banco Santander (Brasil) S.A. matches the AS holder exactly, confirming direct ownership of the address space.
  • The inventory consists of a single contiguous /20 block, which is a standard size for a large corporate allocation, showing no fragmentation or unusual subdivision.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS4230CLARO S.A.973
AS10429TELEFONICA BRASIL S.A16

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-22, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 1 prefixes · 4.10K addresses IPv6 0 prefixes

CountryNamePrefixes
BRBrazil1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
28581
Registry name
ASN28581
Registrant
Banco Santander (Brasil) S.A.
Abuse contact
suporteinternet@santander.com.br
Registered
2004-08-04
Last changed
2015-10-28
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 17 with no ROA
ROAs
0 authorising AS28581
ASPA
no ASPA record
IRR
100% registered · 17 of 17 announcements
Route objects
18 naming AS28581

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 1,779 prefixes, as published 2026-10-23. 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

Cross-check