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AS273663NT FIBRA

BrazilRegistryLACNIC

As of 27th September 2026, AS273663 (NT FIBRA), a network registered in Brazil with LACNIC, originates 4 IPv4 prefixes covering 1.3k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 33,373rd-largest of the 79,523 networks we see originating IPv4, and the 5,432nd-largest of 7,982 in Brazil. It is seen behind 5 upstream networks, most often AS21574 (Century Telecom Ltda) and AS52772 (SJNET TELECOMUNICACOES - EIRELI), and in front of 3 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 30% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

6

IPv4 addresses

1.3k

IPv6 /64s

6.5B

Upstream graph

The networks AS273663 is seen behind, one and two hops out, drawn from real AS paths.

AS273663Toward the internet core
Upstream graph for AS273663: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS273663NT FIBRAThis networkAS1000LINK AMERICANAS1031PEER 1031 LLCAS21574Century Telecom L…AS52772SJNET TELECOMUNIC…AS262355VSX NetworksAS3356Lumen (Level 3)AS6453TATA Communicatio…AS6939Hurricane Electri…AS263444Open X Tecnologia…AS7195EdgeUnoAS57463NetIX Communicati…AS266213PLANETCLICK TELEC…

Networks observed one and two hops upstream of AS273663 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

30

adjacent networks

Upstreams
517%
Peers
2273%
Downstreams
310%

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

Upstreams of AS273663
NetworkCountryRelationshipPathsVantage pts
AS21574Century Telecom LtdaBRPeer504132
AS52772SJNET TELECOMUNICACOES - EIRELIBRPeer25997
AS1031PEER 1031 LLCUSPeer7373
AS1000LINK AMERICANUSPeer132
AS262355VSX NetworksBRPeer82

Prefixes

The largest blocks AS273663 originates, widest first.

Largest prefixes originated by AS273663
PrefixAddressesVisibility
200.124.78.0/2351281/81
177.8.71.0/2425681/81
200.124.78.0/2425614/81
200.124.79.0/2425614/81
2804:8a58::/324.3B × /6464/64
2804:8a58::/332.1B × /6426/64
2804:8a58:100::/4016.8M × /6426/64
2804:8a58:aa00::/4016.8M × /6426/64
2804:8a58:ba00::/4016.8M × /6426/64
2804:8a58:3000::/4865.5k × /6426/64

Routing health

How AS273663'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

  • Valid100.0%10
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more30.0%3
  • Partially propagated40% to 90%50.0%5
  • Seen by few peersUnder 40%20.0%2

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 6 prefixes

  • /324.3B × /6416.7%1
  • /332.1B × /6416.7%1
  • /4016.8M × /6450.0%3
  • /4865.5k × /6416.7%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS273663 started or stopped in this period.

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