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AS200740First Server Limited

United KingdomRegistryRIPE NCCTypeContent

As of 11th November 2026, AS200740 (First Server Limited), a content network registered in the United Kingdom with RIPE NCC, originates 65 IPv4 prefixes covering 30.5k addresses and 19 IPv6 prefixes. By IPv4 address space that makes it the 5,738th-largest of the 80,743 networks we see originating IPv4, and the 159th-largest of 2,122 in the United Kingdom. It is seen behind 4 upstream networks, most often AS56630 (Melbikomas UAB) and AS214602 (AI DATACENTER LIMITED). 98% of its announcements have a valid RPKI ROA; 2 are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers, and 2 prefixes are also originated by another network.

At a glance

IPv4 prefixes

65

IPv6 prefixes

19

IPv4 addresses

30.5k

IPv6 /64s

1.2M

Upstream graph

The networks AS200740 is seen behind, one and two hops out, drawn from real AS paths.

AS200740Toward the internet core
Upstream graph for AS200740: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS200740First Server Limi…This networkAS8849Melbikomas UABAS50113FIRST SERVER LIMI…AS56630Melbikomas UABAS214602AI DATACENTER LIM…AS4637Telstra Internati…AS6453TATA Communicatio…AS35598INETCOM CARRIER L…AS1299Arelion (fka. Tel…AS174Cogent Communicat…AS9002RETN LimitedAS51765Oy Crea Nova Host…

Networks observed one and two hops upstream of AS200740 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

8

adjacent networks

Upstreams
450%
Peers
450%
Downstreams
00%

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

Upstreams of AS200740
NetworkCountryRelationshipPathsVantage pts
AS56630Melbikomas UABLTPeer4,482139
AS214602AI DATACENTER LIMITEDGBPeer828134
AS8849Melbikomas UABLTPeer628139
AS50113FIRST SERVER LIMITEDGBPeer455

Prefixes

All 84

The largest blocks AS200740 originates, widest first.

Largest prefixes originated by AS200740
PrefixAddressesVisibility
45.43.88.0/2351276/76
45.43.90.0/2351276/76
45.134.12.0/2351276/76
45.134.14.0/2351276/76
46.8.120.0/2351276/76
46.8.126.0/2351276/76
46.8.182.0/2351276/76
80.76.32.0/2351276/76
80.76.34.0/2351276/76
83.147.232.0/2351276/76

Routing health

How AS200740'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

  • Valid97.6%82
  • Invalid2.4%2
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more97.6%82
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%2.4%2

Prefix sizes

IPv4 — 65 prefixes

IPv6 — 19 prefixes

  • /4865.5k × /64100.0%19

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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