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AS51945ENLINK LTD

United KingdomRegistryRIPE NCC

As of 28th September 2026, AS51945 (ENLINK LTD), a network registered in the United Kingdom with RIPE NCC, originates 5 IPv4 prefixes covering 3.3k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 19,534th-largest of the 79,544 networks we see originating IPv4, and the 609th-largest of 2,074 in the United Kingdom. It is seen behind 39 upstream networks, most often AS2914 (NTT America, Inc.) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 11 downstream networks. 17% 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

5

IPv6 prefixes

1

IPv4 addresses

3.3k

IPv6 /64s

4.3B

Upstream graph

The networks AS51945 is seen behind, one and two hops out, drawn from real AS paths.

AS51945Toward the internet core
Upstream graph for AS51945: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51945ENLINK LTDThis networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3257GTT Communication…AS3356Lumen (Level 3)AS6939Hurricane Electri…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS6667Elisa OyjAS398465Rackdog LLCAS3549Lumen (fka. Globa…

Networks observed one and two hops upstream of AS51945 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
3921%
Peers
13373%
Downstreams
116%

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

Upstreams of AS51945
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer53926
AS1299Arelion (fka. Telia Carrier)SEPeer35441
AS3356Lumen (Level 3)USPeer2889
AS3257GTT Communications Inc.USPeer20513
AS6939Hurricane Electric LLCUSPeer19832
AS174Cogent Communications, LLCUSPeer13516
AS13030Init7 (Switzerland) Ltd.CHPeer924
AS25091IP-Max SACHPeer414
AS18106Viewqwest Pte LtdSGPeer382
AS5413Wavenet LimitedGBPeer292

Prefixes

The largest blocks AS51945 originates, widest first.

Largest prefixes originated by AS51945
PrefixAddressesVisibility
37.122.248.0/212k81/82
91.221.152.0/2351282/82
37.122.251.0/2425681/82
91.244.181.0/2425682/82
185.190.37.0/2425682/82
2a00:7a40::/324.3B × /6464/65

Routing health

How AS51945'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

  • Valid16.7%1
  • Invalid0.0%0
  • No ROA83.3%5

Propagation

  • Globally propagated90% of full-feed peers or more100.0%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 29th Aug 2026.

No announcement by AS51945 started or stopped in this period.

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