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AS266300FUSAO TELECOM LTDA. - ME

BrazilRegistryLACNIC

As of 27th September 2026, AS266300 (FUSAO TELECOM LTDA. - ME), a network registered in Brazil with LACNIC, originates 7 IPv4 prefixes covering 3.8k addresses and 7 IPv6 prefixes. By IPv4 address space that makes it the 18,607th-largest of the 79,540 networks we see originating IPv4, and the 1,670th-largest of 7,985 in Brazil. It is seen behind 12 upstream networks, most often AS53062 (ACESSOLINE TELECOMUNICACOES LTDA) and AS14840 (BR.DIGITAL). 93% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 57% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

7

IPv6 prefixes

7

IPv4 addresses

3.8k

IPv6 /64s

12.9B

Upstream graph

The networks AS266300 is seen behind, one and two hops out, drawn from real AS paths.

AS266300Toward the internet core
Upstream graph for AS266300: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS266300FUSAO TELECOM LTD…This networkAS14537Continent 8 LLCAS14840BR.DIGITALAS16735Algar TelecomAS35280F5 Networks SARLAS53062ACESSOLINE TELECO…AS2914NTT America, Inc.AS174Cogent Communicat…AS3356Lumen (Level 3)AS6762Telecom Italia Sp…AS1299Arelion (fka. Tel…AS32590Valve CorporationAS52320V.tal (GlobeNet)

Networks observed one and two hops upstream of AS266300 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
1219%
Peers
5181%
Downstreams
00%

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

Upstreams of AS266300
NetworkCountryRelationshipPathsVantage pts
AS53062ACESSOLINE TELECOMUNICACOES LTDABRPeer408119
AS14840BR.DIGITAL BRPeer11137
AS16735Algar TelecomBRPeer7125
AS35280F5 Networks SARLFRPeer175
AS14537Continent 8 LLCUSPeer164
AS137409GSL Networks Pty LTDAUPeer134
AS269300NETMITT IMP & MULTIMIDIA EIRELIBRPeer1111
AS32590Valve CorporationUSPeer82
AS1000LINK AMERICANUSPeer52
AS266213PLANETCLICK TELECOMUNICACOES LTDABRPeer52

Prefixes

The largest blocks AS266300 originates, widest first.

Largest prefixes originated by AS266300
PrefixAddressesVisibility
45.183.248.0/221k11/82
170.79.188.0/221k82/82
170.79.188.0/2351282/82
170.79.190.0/2351282/82
170.79.188.0/2425613/82
170.79.189.0/2425682/82
170.79.191.0/2425682/82
2804:35ac::/324.3B × /6465/65
2804:35ac::/332.1B × /6465/65
2804:35ac:8000::/332.1B × /6465/65

Routing health

How AS266300'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

  • Valid92.9%13
  • Invalid0.0%0
  • No ROA7.1%1

Propagation

  • Globally propagated90% of full-feed peers or more57.1%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%42.9%6

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 7 prefixes

  • /324.3B × /6414.3%1
  • /332.1B × /6428.6%2
  • /341.1B × /6457.1%4

Recent changes

Announcements that started or stopped since 29th Aug 2026.

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