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AS50113FIRST SERVER LIMITED

United KingdomRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS50113 (FIRST SERVER LIMITED), an access network registered in the United Kingdom with RIPE NCC, originates 18 IPv4 prefixes covering 4.6k addresses and 28 IPv6 prefixes. By IPv4 address space that makes it the 16,157th-largest of the 79,525 networks we see originating IPv4, and the 490th-largest of 2,074 in the United Kingdom. It is seen behind 16 upstream networks, most often AS35598 (INETCOM CARRIER LLC) and AS31500 (Global Network Management Inc), and in front of 8 downstream networks. 98% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 78% of its routes reach at least 90% of full-feed peers, and 8 prefixes are also originated by another network.

At a glance

IPv4 prefixes

18

IPv6 prefixes

28

IPv4 addresses

4.6k

IPv6 /64s

68.7B

Upstream graph

The networks AS50113 is seen behind, one and two hops out, drawn from real AS paths.

AS50113Toward the internet core
Upstream graph for AS50113: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS50113FIRST SERVER LIMI…This networkAS1299Arelion (fka. Tel…AS31500Global Network Ma…AS35598INETCOM CARRIER L…AS51601IPTP LTDAS62255BiMajLink d.o.o.AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS1273Vodafone Group PLCAS3356Lumen (Level 3)AS6939Hurricane Electri…AS41095IPTP LTDAS174Cogent Communicat…

Networks observed one and two hops upstream of AS50113 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

87

adjacent networks

Upstreams
1618%
Peers
6372%
Downstreams
89%

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

Upstreams of AS50113
NetworkCountryRelationshipPathsVantage pts
AS35598INETCOM CARRIER LLCRUPeer3,929131
AS31500Global Network Management IncAGPeer1,62229
AS1299Arelion (fka. Telia Carrier)SEPeer1,48524
AS51601IPTP LTDGBPeer1,07427
AS62255BiMajLink d.o.o.SIPeer63914
AS56630Melbikomas UABLTPeer28962
AS29076Citytelecom LLCRUPeer27041
AS202984Team-Host (Chernyshov Aleksandr Aleksandrovich)RUPeer21875
AS25091IP-Max SACHPeer2095
AS24940Hetzner Online GmbHDEPeer1872

Prefixes

All 46

The largest blocks AS50113 originates, widest first.

Largest prefixes originated by AS50113
PrefixAddressesVisibility
5.101.88.0/2425662/81
91.217.77.0/2425681/81
132.243.27.0/2425681/81
185.174.139.0/2425681/81
185.180.230.0/242564/81
185.188.180.0/2425680/81
192.162.100.0/2425681/81
192.162.101.0/2425681/81
192.162.102.0/2425681/81
192.162.103.0/2425681/81

Routing health

How AS50113'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

  • Valid97.8%45
  • Invalid0.0%0
  • No ROA2.2%1

Propagation

  • Globally propagated90% of full-feed peers or more78.3%36
  • Partially propagated40% to 90%4.3%2
  • Seen by few peersUnder 40%17.4%8

Prefix sizes

IPv4 — 18 prefixes

IPv6 — 28 prefixes

  • /2934.4B × /643.6%1
  • /324.3B × /6428.6%8
  • /4865.5k × /6464.3%18
  • /49 and longerAggregated3.6%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS50113 started or stopped in this period.

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