subnet.im

AS209181Zenex 5ive Limited

United KingdomRegistryRIPE NCC

As of 26th September 2026, AS209181 (Zenex 5ive Limited), a network registered in the United Kingdom with RIPE NCC, originates 42 IPv4 prefixes covering 12.3k addresses and 8 IPv6 prefixes. By IPv4 address space that makes it the 9,374th-largest of the 79,516 networks we see originating IPv4, and the 282nd-largest of 2,074 in the United Kingdom. It is seen behind 32 upstream networks, most often AS9002 (RETN Limited) and AS33891 (Core-Backbone GmbH), and in front of 1 downstream network. 98% of its announcements have 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

42

IPv6 prefixes

8

IPv4 addresses

12.3k

IPv6 /64s

34.4B

Upstream graph

The networks AS209181 is seen behind, one and two hops out, drawn from real AS paths.

AS209181Toward the internet core
Upstream graph for AS209181: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS209181Zenex 5ive LimitedThis networkAS3257GTT Communication…AS6453TATA Communicatio…AS9002RETN LimitedAS33891Core-Backbone GmbHAS34309Link11 GmbHAS8220COLTAS35280F5 Networks SARLAS6667Elisa OyjAS51907Kanton ZugAS24940Hetzner Online Gm…AS174Cogent Communicat…AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS209181 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

183

adjacent networks

Upstreams
3217%
Peers
15082%
Downstreams
11%

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

Upstreams of AS209181
NetworkCountryRelationshipPathsVantage pts
AS9002RETN LimitedGBPeer65736
AS33891Core-Backbone GmbHDEPeer57243
AS6453TATA Communications (America) IncUSPeer48718
AS34309Link11 GmbHDEPeer47024
AS3257GTT Communications Inc.USPeer36412
AS6424EDGOO NETWORKSPTPeer29715
AS174Cogent Communications, LLCUSPeer20511
AS6830Liberty Global Europe Holding B.V.EUPeer788
AS38880Micron21 Datacentre Pty LtdAUPeer762
AS8298IPng Networks GmbHCHPeer512

Prefixes

All 50

The largest blocks AS209181 originates, widest first.

Largest prefixes originated by AS209181
PrefixAddressesVisibility
2.58.192.0/221k81/81
45.90.104.0/221k81/81
2.58.192.0/2425681/81
2.58.193.0/2425681/81
2.58.194.0/2425681/81
2.58.195.0/2425681/81
5.182.49.0/2425681/81
5.252.117.0/2425681/81
5.252.160.0/2425681/81
45.86.92.0/2425681/81

Routing health

How AS209181'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

  • Valid98.0%49
  • Invalid0.0%0
  • No ROA2.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%50
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 42 prefixes

IPv6 — 8 prefixes

  • /2934.4B × /6412.5%1
  • /4865.5k × /6487.5%7

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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