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AS50131Spartan Host Ltd

United KingdomRegistryRIPE NCC

As of 26th September 2026, AS50131 (Spartan Host Ltd), a network registered in the United Kingdom with RIPE NCC, originates 66 IPv4 prefixes covering 20.2k addresses and 36 IPv6 prefixes. By IPv4 address space that makes it the 7,045th-largest of the 79,480 networks we see originating IPv4, and the 196th-largest of 2,074 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. 67% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 79% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

66

IPv6 prefixes

36

IPv4 addresses

20.2k

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 LLCAS18106Viewqwest Pte LtdAS20130Depaul UniversityAS2914NTT 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

79

adjacent networks

Upstreams
2025%
Peers
4759%
Downstreams
1215%

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

Upstreams of AS50131
NetworkCountryRelationshipPathsVantage pts
AS3257GTT Communications Inc.USPeer1,932124
AS174Cogent Communications, LLCUSPeer1,676100
AS36236NetActuate, IncUSPeer1,06277
AS6939Hurricane Electric LLCUSPeer74628
AS13335Cloudflare, Inc.USPeer70581
AS29802HIVELOCITY, Inc.USPeer609145
AS59692IQWeb FZ-LLCAEPeer55280
AS30456Cosmic Global NetworksUSPeer26725
AS23033Wowrack.comUSPeer25513
AS137409GSL Networks Pty LTDAUPeer10282

Prefixes

All 102

The largest blocks AS50131 originates, widest first.

Largest prefixes originated by AS50131
PrefixAddressesVisibility
75.153.68.0/221k80/81
75.153.76.0/221k80/81
77.239.116.0/221k80/81
143.109.40.0/221k80/81
104.218.232.0/2351280/81
23.27.2.0/2425680/81
23.27.7.0/2425680/81
23.27.21.0/2425680/81
23.27.100.0/2425680/81
23.27.190.0/2425680/81

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

  • Valid66.7%68
  • Invalid0.0%0
  • No ROA33.3%34

Propagation

  • Globally propagated90% of full-feed peers or more79.4%81
  • Partially propagated40% to 90%20.6%21
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 66 prefixes

IPv6 — 36 prefixes

  • /341.1B × /642.8%1
  • /3867.1M × /6422.2%8
  • /441M × /642.8%1
  • /4865.5k × /6472.2%26

Recent changes

Announcements that started or stopped since 27th Aug 2026.

  • Announced2604:9cc0:2c::/4822nd Sept 2026
  • Withdrawn192.177.74.0/2421st Sept 2026
  • Withdrawn192.177.83.0/2421st Sept 2026
  • Withdrawn192.177.93.0/2421st Sept 2026

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