subnet.im

AS201115Pylon One Ltd

United KingdomRegistryRIPE NCC

As of 11th November 2026, AS201115 (Pylon One Ltd), a network registered in the United Kingdom with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,988th-largest of the 80,763 networks we see originating IPv4, and the 1,620th-largest of 2,122 in the United Kingdom. It is seen behind 2 upstream networks, most often AS209505 (Unchained ISP Limited) and AS34555 (C.C.S. (Leeds) Ltd). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

33.6M

Upstream graph

The networks AS201115 is seen behind, one and two hops out, drawn from real AS paths.

AS201115Toward the internet core
Upstream graph for AS201115: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS201115Pylon One LtdThis networkAS34555C.C.S. (Leeds) LtdAS209505Unchained ISP Lim…AS174Cogent Communicat…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS35200TransitX Ltd

Networks observed one and two hops upstream of AS201115 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS201115
NetworkCountryRelationshipPathsVantage pts
AS209505Unchained ISP LimitedGBPeer109109
AS34555C.C.S. (Leeds) LtdGBPeer2929

Prefixes

The largest blocks AS201115 originates, widest first.

Largest prefixes originated by AS201115
PrefixAddressesVisibility
45.157.175.0/2425677/77
2a13:3840::/3933.6M × /6461/63

Routing health

How AS201115'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /3933.6M × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS201115 started or stopped in this period.

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