AS28581 — Banco Santander Brasil S.A.

AS28581 announces 1 IPv4 prefixes covering 4,096 addresses and 0 IPv6 prefixes.

About this network

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.

Announced prefixes

• 200.220.176.0/20

Upstream networks

• AS4230 CLARO S.A.
• AS10429 TELEFONICA BRASIL S.A

Adjacent networks

• AS4230 CLARO S.A.
• AS10429 TELEFONICA BRASIL S.A

Routing security

• RPKI: 0 valid, 0 invalid and 17 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 18 route objects.
• Listed in as-sets: AS-AS10429-CLIENTES, AS-CTBC-CUSTOMERS2, AS-CTBC-TOOLS-10, AS-EMBRATELNET, AS60503:AS-ALL-CUSTOMERS.