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AS50131Spartan Host Ltd

United KingdomRegistryRIPE NCC

As of 11th November 2026, AS50131 (Spartan Host Ltd), a network registered in the United Kingdom with RIPE NCC, originates 67 IPv4 prefixes covering 20.5k addresses and 37 IPv6 prefixes. By IPv4 address space that makes it the 7,057th-largest of the 80,743 networks we see originating IPv4, and the 199th-largest of 2,122 in the United Kingdom. It is seen behind 20 upstream networks, most often AS3257 (GTT Communications Inc.) and AS174 (Cogent Communications, LLC), and in front of 12 downstream networks. 57% of its announcements have a valid RPKI ROA; 10 are RPKI-invalid. 68% 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

67

IPv6 prefixes

37

IPv4 addresses

20.5k

IPv6 /64s

1.6B

Upstream graph

The networks AS50131 is seen behind, one and two hops out, drawn from real AS paths.

AS50131Toward the internet core
Upstream graph for AS50131: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS50131Spartan Host LtdThis networkAS174Cogent Communicat…AS3257GTT Communication…AS6939Hurricane Electri…AS13335Cloudflare, Inc.AS36236NetActuate, IncAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS6667Elisa OyjAS398465Rackdog LLCAS20130Depaul UniversityAS3356Lumen (Level 3)AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS50131 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

82

adjacent networks

Upstreams
2024%
Peers
5061%
Downstreams
1215%

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

Upstreams of AS50131
NetworkCountryRelationshipPathsVantage pts
AS3257GTT Communications Inc.USPeer1,519118
AS174Cogent Communications, LLCUSPeer1,217101
AS36236NetActuate, IncUSPeer85376
AS13335Cloudflare, Inc.USPeer68976
AS6939Hurricane Electric LLCUSPeer64324
AS29802HIVELOCITY, Inc.USPeer583139
AS59692IQWeb FZ-LLCAEPeer26975
AS30456Cosmic Global NetworksUSPeer22321
AS23033Wowrack.comUSPeer21612
AS137409GSL Networks Pty LTDAUPeer16977

Prefixes

All 104

The largest blocks AS50131 originates, widest first.

Largest prefixes originated by AS50131
PrefixAddressesVisibility
75.153.68.0/221k75/76
75.153.76.0/221k75/76
77.239.116.0/221k75/76
143.109.40.0/221k75/76
104.218.232.0/2351275/76
23.27.2.0/2425675/76
23.27.7.0/2425675/76
23.27.21.0/2425675/76
23.27.100.0/242561/76
23.27.190.0/2425675/76

Routing health

How AS50131'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

  • Valid56.7%59
  • Invalid9.6%10
  • No ROA33.7%35

Propagation

  • Globally propagated90% of full-feed peers or more68.3%71
  • Partially propagated40% to 90%21.2%22
  • Seen by few peersUnder 40%10.6%11

Prefix sizes

IPv4 — 67 prefixes

IPv6 — 37 prefixes

  • /341.1B × /642.7%1
  • /3867.1M × /6421.6%8
  • /441M × /642.7%1
  • /4865.5k × /6473.0%27

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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