subnet.im

AS50113FIRST SERVER LIMITED

United KingdomRegistryRIPE NCCTypeEyeball

As of 12th November 2026, AS50113 (FIRST SERVER LIMITED), an access network registered in the United Kingdom with RIPE NCC, originates 20 IPv4 prefixes covering 5.1k addresses and 24 IPv6 prefixes. By IPv4 address space that makes it the 15,574th-largest of the 80,772 networks we see originating IPv4, and the 468th-largest of 2,122 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. 84% of its routes reach at least 90% of full-feed peers, and 6 prefixes are also originated by another network.

At a glance

IPv4 prefixes

20

IPv6 prefixes

24

IPv4 addresses

5.1k

IPv6 /64s

51.5B

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.AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS1273Vodafone Group PLCAS3356Lumen (Level 3)AS20485JSC TransTeleComAS6939Hurricane Electri…AS41095IPTP LTD

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

79

adjacent networks

Upstreams
1620%
Peers
5570%
Downstreams
810%

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

Upstreams of AS50113
NetworkCountryRelationshipPathsVantage pts
AS35598INETCOM CARRIER LLCRUPeer3,512129
AS31500Global Network Management IncAGPeer1,63926
AS1299Arelion (fka. Telia Carrier)SEPeer1,47221
AS51601IPTP LTDGBPeer90723
AS62255BiMajLink d.o.o.SIPeer76732
AS29076Citytelecom LLCRUPeer5457
AS24482SG.GSSGPeer3995
AS56630Melbikomas UABLTPeer22859
AS25091IP-Max SACHPeer2183
AS24940Hetzner Online GmbHDEPeer1932

Prefixes

All 44

The largest blocks AS50113 originates, widest first.

Largest prefixes originated by AS50113
PrefixAddressesVisibility
5.101.88.0/2425659/78
5.180.136.0/242564/78
5.180.137.0/242564/78
91.217.77.0/2425678/78
132.243.27.0/2425678/78
185.174.139.0/2425678/78
185.180.230.0/242563/78
185.188.180.0/2425677/78
192.162.100.0/2425678/78
192.162.101.0/2425678/78

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

  • Valid97.7%43
  • Invalid0.0%0
  • No ROA2.3%1

Propagation

  • Globally propagated90% of full-feed peers or more84.1%37
  • Partially propagated40% to 90%2.3%1
  • Seen by few peersUnder 40%13.6%6

Prefix sizes

IPv4 — 20 prefixes

IPv6 — 24 prefixes

  • /2934.4B × /644.2%1
  • /324.3B × /6416.7%4
  • /4865.5k × /6475.0%18
  • /49 and longerAggregated4.2%1

Recent changes

Announcements that started or stopped since 13th Oct 2026.

  • Withdrawn2a04:5203::/3213th Oct 2026
  • Withdrawn2a04:5204::/3213th Oct 2026
  • Withdrawn2a04:5205::/3213th Oct 2026
  • Withdrawn2a04:5206::/3213th Oct 2026

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