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AS28580FASTERNET

BrazilRegistryLACNICTypeEyeball

As of 25th October 2026, AS28580 (FASTERNET), an access network registered in Brazil with LACNIC, originates 195 IPv4 prefixes covering 192k addresses and 15 IPv6 prefixes. By IPv4 address space that makes it the 1,411th-largest of the 79,675 networks we see originating IPv4, and the 38th-largest of 7,990 in Brazil. It is seen behind 13 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS37468 (Angola Cables), and in front of 5 downstream networks. 6% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 20% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

195

IPv6 prefixes

15

IPv4 addresses

192k

IPv6 /64s

8.6B

Upstream graph

The networks AS28580 is seen behind, one and two hops out, drawn from real AS paths.

AS28580Toward the internet core
Upstream graph for AS28580: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS28580FASTERNETThis networkAS3356Lumen (Level 3)AS6939Hurricane Electri…AS28649Desktop Sigmanet …AS35280F5 Networks SARLAS37468Angola CablesAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337AxclusiveAS32590Valve CorporationAS1299Arelion (fka. Tel…AS3257GTT Communication…

Networks observed one and two hops upstream of AS28580 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

80

adjacent networks

Upstreams
1316%
Peers
6278%
Downstreams
56%

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

Upstreams of AS28580
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer2,35932
AS37468Angola CablesAOPeer2,10882
AS3356Lumen (Level 3)USPeer1,20667
AS28649Desktop Sigmanet Comunicação Multimídia SABRPeer67546
AS35280F5 Networks SARLFRPeer4275
AS14537Continent 8 LLCUSPeer2724
AS1000LINK AMERICANUSPeer2162
AS137409GSL Networks Pty LTDAUPeer1672
AS266213PLANETCLICK TELECOMUNICACOES LTDABRPeer1552
AS32590Valve CorporationUSPeer1542

Prefixes

All 210

The largest blocks AS28580 originates, widest first.

Largest prefixes originated by AS28580
PrefixAddressesVisibility
186.224.128.0/198.2k76/76
186.224.160.0/198.2k76/76
177.101.48.0/204.1k76/76
187.45.0.0/204.1k76/76
187.45.16.0/204.1k76/76
187.84.0.0/204.1k76/76
189.28.224.0/204.1k76/76
189.28.240.0/204.1k76/76
189.51.208.0/204.1k76/76
191.253.240.0/204.1k76/76

Routing health

How AS28580'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

  • Valid5.7%12
  • Invalid0.0%0
  • No ROA94.3%198

Propagation

  • Globally propagated90% of full-feed peers or more20.5%43
  • Partially propagated40% to 90%1.0%2
  • Seen by few peersUnder 40%78.6%165

Prefix sizes

IPv4 — 195 prefixes

IPv6 — 15 prefixes

  • /324.3B × /646.7%1
  • /332.1B × /6413.3%2
  • /4865.5k × /6480.0%12

Recent changes

Announcements that started or stopped since 25th Sept 2026.

No announcement by AS28580 started or stopped in this period.

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