subnet.im

AS8851GCI Network Solutions Limited

United KingdomRegistryRIPE NCCTypeEyeball

As of 27th September 2026, AS8851 (GCI Network Solutions Limited), an access network registered in the United Kingdom with RIPE NCC, originates 338 IPv4 prefixes covering 815k addresses and 6 IPv6 prefixes. By IPv4 address space that makes it the 534th-largest of the 79,540 networks we see originating IPv4, and the 12th-largest of 2,074 in the United Kingdom. It is seen behind 39 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. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

338

IPv6 prefixes

6

IPv4 addresses

815k

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)AS6424EDGOO NETWORKSAS6667Elisa OyjAS6939Hurricane Electri…AS25091IP-Max SAAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS8298IPng Networks GmbHAS56662Marcin Gondek

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

166

adjacent networks

Upstreams
3923%
Peers
12475%
Downstreams
32%

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

Upstreams of AS8851
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer11,225132
AS3356Lumen (Level 3)USPeer7,92947
AS6667Elisa OyjFIPeer6242
AS25091IP-Max SACHPeer4393
AS58511Swoop (Anycast Global Backbone)AUPeer3192
AS16552Tiggee LLCUSPeer3192
AS6424EDGOO NETWORKSPTPeer3192
AS39122Blacknight Internet Solutions LimitedIEPeer3182
AS5413Wavenet LimitedGBPeer3182
AS52075Wifirst S.A.S.FRPeer3182

Prefixes

All 344

The largest blocks AS8851 originates, widest first.

Largest prefixes originated by AS8851
PrefixAddressesVisibility
82.152.0.0/15131k82/82
109.176.0.0/1665.5k82/82
159.15.0.0/1665.5k82/82
81.168.0.0/1732.8k82/82
91.84.128.0/1732.8k82/82
77.107.64.0/1816.4k82/82
81.5.128.0/1816.4k82/82
89.213.64.0/1816.4k82/82
91.84.0.0/1816.4k82/82
91.85.64.0/1816.4k82/82

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%337
  • Invalid0.0%0
  • No ROA2.0%7

Propagation

  • Globally propagated90% of full-feed peers or more100.0%344
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 338 prefixes

IPv6 — 6 prefixes

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

Recent changes

Announcements that started or stopped since 29th Aug 2026.

139 announced and 19 withdrawn in all; the most recent are shown.

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