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AS8851GCI Network Solutions Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 12th November 2026, AS8851 (GCI Network Solutions Limited), an access network registered in the United Kingdom with RIPE NCC, originates 345 IPv4 prefixes covering 825k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 544th-largest of the 80,772 networks we see originating IPv4, and the 12th-largest of 2,122 in the United Kingdom. It is seen behind 30 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS3356 (Lumen (Level 3)), and in front of 3 downstream networks. 98% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 92% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

345

IPv6 prefixes

6

IPv4 addresses

825k

IPv6 /64s

85.9B

Upstream graph

The networks AS8851 is seen behind, one and two hops out, drawn from real AS paths.

AS8851Toward the internet core
Upstream graph for AS8851: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8851GCI Network Solut…This networkAS3356Lumen (Level 3)AS5413Wavenet LimitedAS6667Elisa OyjAS6939Hurricane Electri…AS24482SG.GSAS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS1299Arelion (fka. Tel…AS20130Depaul UniversityAS132337AxclusiveAS38623Metfone (Viettel …AS215859Hetzner Cloud - S…

Networks observed one and two hops upstream of AS8851 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

117

adjacent networks

Upstreams
3026%
Peers
8472%
Downstreams
33%

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

Upstreams of AS8851
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer12,911108
AS3356Lumen (Level 3)USPeer4,90322
AS24482SG.GSSGPeer6383
AS6667Elisa OyjFIPeer6362
AS49544i3D.net B.VNLPeer3242
AS25091IP-Max SACHPeer3242
AS5413Wavenet LimitedGBPeer3242
AS39122Blacknight Internet Solutions LimitedIEPeer3242
AS52075Wifirst S.A.S.FRPeer3242
AS58511Swoop (Anycast Global Backbone)AUPeer3191

Prefixes

All 351

The largest blocks AS8851 originates, widest first.

Largest prefixes originated by AS8851
PrefixAddressesVisibility
82.152.0.0/15131k1/78
109.176.0.0/1665.5k1/78
159.15.0.0/1665.5k78/78
81.168.0.0/1732.8k78/78
91.84.128.0/1732.8k78/78
77.107.64.0/1816.4k78/78
81.5.128.0/1816.4k78/78
89.213.64.0/1816.4k1/78
91.84.0.0/1816.4k78/78
91.85.64.0/1816.4k78/78

Routing health

How AS8851'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

  • Valid98.0%344
  • Invalid0.0%0
  • No ROA2.0%7

Propagation

  • Globally propagated90% of full-feed peers or more91.7%322
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%8.3%29

Prefix sizes

IPv4 — 345 prefixes

IPv6 — 6 prefixes

  • /2934.4B × /6433.3%2
  • /324.3B × /6466.7%4

Recent changes

Announcements that started or stopped since 13th Oct 2026.

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