subnet.im

AS204844NCSE NETWORK LTD

United KingdomRegistryRIPE NCC

As of 11th November 2026, AS204844 (NCSE NETWORK LTD), a network registered in the United Kingdom with RIPE NCC, originates 4 IPv4 prefixes covering 1k addresses and 14 IPv6 prefixes. By IPv4 address space that makes it the 36,497th-largest of the 80,747 networks we see originating IPv4, and the 1,058th-largest of 2,122 in the United Kingdom. It is seen behind 8 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS134823 (Sky Digital Co., Ltd.), and in front of 13 downstream networks. 94% 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

4

IPv6 prefixes

14

IPv4 addresses

1k

IPv6 /64s

290M

Upstream graph

The networks AS204844 is seen behind, one and two hops out, drawn from real AS paths.

AS204844Toward the internet core
Upstream graph for AS204844: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS204844NCSE NETWORK LTDThis networkAS174Cogent Communicat…AS6939Hurricane Electri…AS17408AboveNet Communic…AS32595Liberally Network…AS134823Sky Digital Co., …AS20130Depaul UniversityAS132337AxclusiveAS15412Flag Telecom UK L…AS18423RAID Networks Co.…AS393577Tritan DevelopmentAS2914NTT America, Inc.AS3491PCCW Global (HK) …

Networks observed one and two hops upstream of AS204844 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

50

adjacent networks

Upstreams
816%
Peers
2958%
Downstreams
1326%

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

Upstreams of AS204844
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer1,35667
AS134823Sky Digital Co., Ltd.TWPeer261114
AS32595Liberally Network, LLCUSPeer18063
AS17408AboveNet Communications TaiwanTWPeer17674
AS174Cogent Communications, LLCUSPeer9619
AS20473The Constant Company, LLCUSPeer6262
AS24482SG.GSSGPeer173
AS10133Chief Telecom Inc.TWPeer11

Prefixes

The largest blocks AS204844 originates, widest first.

Largest prefixes originated by AS204844
PrefixAddressesVisibility
23.146.248.0/2425675/76
44.30.114.0/2425675/76
151.246.244.0/2425675/76
162.4.237.0/2425676/76
2a14:7581:6000::/36268M × /6463/63
2602:faad::/4016.8M × /6463/63
2a06:a005:14f0::/441M × /6463/63
2a06:a005:1b40::/441M × /6463/63
2a06:a005:1be0::/441M × /6463/63
2a06:a005:1d60::/441M × /6463/63

Routing health

How AS204844'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

  • Valid94.4%17
  • Invalid0.0%0
  • No ROA5.6%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 14 prefixes

  • /36268M × /647.1%1
  • /4016.8M × /647.1%1
  • /441M × /6428.6%4
  • /4865.5k × /6457.1%8

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS204844 started or stopped in this period.

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