subnet.im

AS270257NETFSA BANDA LARGA

BrazilRegistryLACNIC

As of 23rd October 2026, AS270257 (NETFSA BANDA LARGA), a network registered in Brazil with LACNIC, originates 5 IPv4 prefixes covering 1.3k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 33,399th-largest of the 79,658 networks we see originating IPv4, and the 5,422nd-largest of 7,989 in Brazil. It is seen behind 7 upstream networks, most often AS52872 (VOANET Telecomunicações Ltda.) and AS267564 (FIBER TELECOM - TELECOMUNICAÇÃO DE DADOS), and in front of 1 downstream network. None of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 86% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

5

IPv6 prefixes

2

IPv4 addresses

1.3k

IPv6 /64s

6.4B

Upstream graph

The networks AS270257 is seen behind, one and two hops out, drawn from real AS paths.

AS270257Toward the internet core
Upstream graph for AS270257: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS270257NETFSA BANDA LARGAThis networkAS6939Hurricane Electri…AS14537Continent 8 LLCAS32590Valve CorporationAS52872VOANET Telecomuni…AS267564FIBER TELECOM - T…AS20130Depaul UniversityAS132337AxclusiveAS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS262999IVI TECNOLOGIA E …AS268199Rios Network

Networks observed one and two hops upstream of AS270257 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

50

adjacent networks

Upstreams
714%
Peers
4284%
Downstreams
12%

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

Upstreams of AS270257
NetworkCountryRelationshipPathsVantage pts
AS52872VOANET Telecomunicações Ltda.BRPeer417135
AS267564FIBER TELECOM - TELECOMUNICAÇÃO DE DADOSBRPeer8282
AS6939Hurricane Electric LLCUSPeer1414
AS14537Continent 8 LLCUSPeer22
AS35280F5 Networks SARLFRPeer11
AS266213PLANETCLICK TELECOMUNICACOES LTDABRPeer11
AS32590Valve CorporationUSPeer11

Prefixes

The largest blocks AS270257 originates, widest first.

Largest prefixes originated by AS270257
PrefixAddressesVisibility
45.4.156.0/2425610/77
200.108.176.0/2425677/77
200.108.177.0/2425677/77
200.108.178.0/2425677/77
200.108.179.0/2425677/77
2804:693c::/324.3B × /6462/64
2804:693c::/332.1B × /6461/64

Routing health

How AS270257'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
  • Invalid14.3%1
  • No ROA85.7%6

Propagation

  • Globally propagated90% of full-feed peers or more85.7%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%14.3%1

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /332.1B × /6450.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

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