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AS205544Leaseweb UK Limited

United KingdomRegistryRIPE NCC

As of 27th September 2026, AS205544 (Leaseweb UK Limited), a network registered in the United Kingdom with RIPE NCC, originates 64 IPv4 prefixes covering 56.3k addresses and 32 IPv6 prefixes. By IPv4 address space that makes it the 4,222nd-largest of the 79,525 networks we see originating IPv4, and the 91st-largest of 2,074 in the United Kingdom. It is seen behind 5 upstream networks, most often AS16265 (LeaseWeb Network B.V.) and AS6453 (TATA Communications (America) Inc). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 96% of its routes reach at least 90% of full-feed peers, and 5 prefixes are also originated by another network.

At a glance

IPv4 prefixes

64

IPv6 prefixes

32

IPv4 addresses

56.3k

IPv6 /64s

790B

Upstream graph

The networks AS205544 is seen behind, one and two hops out, drawn from real AS paths.

AS205544Toward the internet core
Upstream graph for AS205544: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS205544Leaseweb UK Limit…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3257GTT Communication…AS6453TATA Communicatio…AS16265LeaseWeb Network …AS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS8220COLTAS35280F5 Networks SARLAS7713PT Telkom Indones…AS12956Telxius (Telefoni…

Networks observed one and two hops upstream of AS205544 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

10

adjacent networks

Upstreams
550%
Peers
550%
Downstreams
00%

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

Upstreams of AS205544
NetworkCountryRelationshipPathsVantage pts
AS16265LeaseWeb Network B.V.NLPeer3,88288
AS6453TATA Communications (America) IncUSPeer1,37133
AS1299Arelion (fka. Telia Carrier)SEPeer1,17847
AS174Cogent Communications, LLCUSPeer41918
AS3257GTT Communications Inc.USPeer1448

Prefixes

All 96

The largest blocks AS205544 originates, widest first.

Largest prefixes originated by AS205544
PrefixAddressesVisibility
82.113.64.0/198.2k81/81
95.168.176.0/204.1k81/81
23.19.56.0/212k81/81
23.81.32.0/212k81/81
23.106.32.0/212k81/81
23.106.56.0/212k81/81
23.106.232.0/212k81/81
81.17.56.0/212k81/81
95.168.176.0/212k81/81
173.208.48.0/212k81/81

Routing health

How AS205544'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%96
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more95.8%92
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%4.2%4

Prefix sizes

IPv4 — 64 prefixes

IPv6 — 32 prefixes

  • /2934.4B × /6468.8%22
  • /324.3B × /6425.0%8
  • /4865.5k × /646.3%2

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.