subnet.im

AS15256Itau Unibanco S.A.

BrazilRegistryLACNICTypeContent

As of 23rd October 2026, AS15256 (Itau Unibanco S.A.), a content network registered in Brazil with LACNIC, originates 12 IPv4 prefixes covering 11.8k addresses. By IPv4 address space that makes it the 9,681st-largest of the 79,666 networks we see originating IPv4, and the 621st-largest of 7,987 in Brazil. It is seen behind 9 upstream networks, most often AS4230 (Claro (Embratel)) and AS10429 (Vivo (Telefônica Brasil)). None of its announcements have a valid RPKI ROA. 67% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

12

IPv6 prefixes

0

IPv4 addresses

11.8k

IPv6 /64s

0

Upstream graph

The networks AS15256 is seen behind, one and two hops out, drawn from real AS paths.

AS15256Toward the internet core
Upstream graph for AS15256: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS15256Itau Unibanco S.A.This networkAS3356Lumen (Level 3)AS4230Claro (Embratel)AS10429Vivo (Telefônica …AS14537Continent 8 LLCAS35280F5 Networks SARLAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1000LINK AMERICANAS12956Telxius (Telefoni…AS1299Arelion (fka. Tel…AS32590Valve Corporation

Networks observed one and two hops upstream of AS15256 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

63

adjacent networks

Upstreams
914%
Peers
5486%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS15256
NetworkCountryRelationshipPathsVantage pts
AS4230Claro (Embratel)BRPeer42072
AS10429Vivo (Telefônica Brasil)BRPeer10177
AS3356Lumen (Level 3)USPeer7777
AS35280F5 Networks SARLFRPeer143
AS14537Continent 8 LLCUSPeer122
AS137409GSL Networks Pty LTDAUPeer102
AS266213PLANETCLICK TELECOMUNICACOES LTDABRPeer81
AS1000LINK AMERICANUSPeer81
AS32590Valve CorporationUSPeer61

Prefixes

The largest blocks AS15256 originates, widest first.

Largest prefixes originated by AS15256
PrefixAddressesVisibility
200.196.144.0/204.1k77/77
200.196.144.0/212k10/77
200.196.152.0/212k10/77
138.59.160.0/221k77/77
138.59.160.0/2351210/77
138.59.162.0/2351210/77
8.243.33.0/2425677/77
138.59.161.0/2425677/77
138.59.162.0/2425677/77
200.196.145.0/2425677/77

Routing health

How AS15256's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%12

Propagation

  • Globally propagated90% of full-feed peers or more66.7%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%33.3%4

Prefix sizes

IPv4 — 12 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS15256 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.