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AS205072Layershift Limited

United KingdomRegistryRIPE NCC

As of 10th November 2026, AS205072 (Layershift Limited), a network registered in the United Kingdom with RIPE NCC, originates 8 IPv4 prefixes covering 10k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 10,736th-largest of the 80,723 networks we see originating IPv4, and the 331st-largest of 2,122 in the United Kingdom. It is seen behind 4 upstream networks, most often AS42831 (UK Dedicated Servers Limited) and AS35200 (TransitX Ltd). 67% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 56% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

8

IPv6 prefixes

1

IPv4 addresses

10k

IPv6 /64s

4.3B

Upstream graph

The networks AS205072 is seen behind, one and two hops out, drawn from real AS paths.

AS205072Toward the internet core
Upstream graph for AS205072: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS205072Layershift LimitedThis networkAS174Cogent Communicat…AS2914NTT America, Inc.AS35200TransitX LtdAS42831UK Dedicated Serv…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS9002RETN Limited

Networks observed one and two hops upstream of AS205072 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

9

adjacent networks

Upstreams
444%
Peers
556%
Downstreams
00%

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

Upstreams of AS205072
NetworkCountryRelationshipPathsVantage pts
AS42831UK Dedicated Servers LimitedGBPeer16442
AS35200TransitX LtdGBPeer14236
AS174Cogent Communications, LLCUSPeer5252
AS2914NTT America, Inc.USPeer1110

Prefixes

The largest blocks AS205072 originates, widest first.

Largest prefixes originated by AS205072
PrefixAddressesVisibility
109.109.128.0/204.1k76/76
87.239.16.0/212k76/76
45.137.36.0/221k1/76
45.155.20.0/221k76/76
185.149.108.0/221k76/76
146.19.83.0/242561/76
195.5.176.0/242561/76
217.8.119.0/242561/76
2a0d:da00::/324.3B × /6461/63

Routing health

How AS205072'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%6
  • Invalid0.0%0
  • No ROA33.3%3

Propagation

  • Globally propagated90% of full-feed peers or more55.6%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%44.4%4

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

  • Withdrawn195.5.168.0/246th Nov 2026
  • Withdrawn195.5.170.0/2430th Oct 2026
  • Announced146.19.83.0/2429th Oct 2026
  • Announced195.5.168.0/2429th Oct 2026
  • Announced195.5.170.0/2429th Oct 2026
  • Announced195.5.176.0/2429th Oct 2026
  • Announced217.8.119.0/2429th Oct 2026
  • Announced45.137.36.0/2229th Oct 2026
  • Withdrawn217.8.119.0/2419th Oct 2026
  • Withdrawn45.137.36.0/2219th Oct 2026
  • Withdrawn146.19.83.0/2419th Oct 2026
  • Withdrawn195.5.168.0/2419th Oct 2026

6 announced and 9 withdrawn in all; the most recent are shown.

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