subnet.im

AS8220COLT

United KingdomRegistryRIPE NCCTypeCarrier

As of 10th November 2026, AS8220 (COLT), a transit carrier registered in the United Kingdom with RIPE NCC, originates 154 IPv4 prefixes covering 1.5M addresses and 19 IPv6 prefixes. By IPv4 address space that makes it the 354th-largest of the 80,723 networks we see originating IPv4, and the 8th-largest of 2,122 in the United Kingdom. It is seen behind 65 upstream networks, most often AS3356 (Lumen (Level 3)) and AS1299 (Arelion (fka. Telia Carrier)), and in front of 1,259 downstream networks. 91% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

154

IPv6 prefixes

19

IPv4 addresses

1.5M

IPv6 /64s

25.8B

Upstream graph

The networks AS8220 is seen behind, one and two hops out, drawn from real AS paths.

AS8220Toward the internet core
Upstream graph for AS8220: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8220COLTThis networkAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS3491PCCW Global (HK) …AS16552Tiggee LLCAS32590Valve CorporationAS13030Init7 (Switzerlan…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS8220 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

3,330

adjacent networks

Upstreams
652%
Peers
2,00660%
Downstreams
1,25938%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 65.

Upstreams of AS8220
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer31,52575
AS1299Arelion (fka. Telia Carrier)SEPeer20,00852
AS32590Valve CorporationUSPeer18,6206
AS16552Tiggee LLCUSPeer15,4764
AS3491PCCW Global (HK) Ltd.HKPeer14,99344
AS18106Viewqwest Pte LtdSGPeer13,1814
AS6453TATA Communications (America) IncUSPeer12,911136
AS35280F5 Networks SARLFRPeer12,8666
AS7713PT Telkom Indonesia TbkIDPeer10,9554
AS14537Continent 8 LLCUSPeer10,3334

Prefixes

All 173

The largest blocks AS8220 originates, widest first.

Largest prefixes originated by AS8220
PrefixAddressesVisibility
217.110.0.0/15131k76/76
57.133.0.0/1665.5k76/76
58.0.0.0/1665.5k76/76
62.23.0.0/1665.5k76/76
62.96.0.0/1665.5k76/76
80.169.0.0/1665.5k76/76
84.14.0.0/1665.5k76/76
136.225.0.0/1665.5k76/76
148.109.0.0/1665.5k76/76
213.61.0.0/1665.5k76/76

Routing health

How AS8220'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

  • Valid91.3%158
  • Invalid0.0%0
  • No ROA8.7%15

Propagation

  • Globally propagated90% of full-feed peers or more98.3%170
  • Partially propagated40% to 90%1.2%2
  • Seen by few peersUnder 40%0.6%1

Prefix sizes

IPv4 — 154 prefixes

IPv6 — 19 prefixes

  • /324.3B × /6431.6%6
  • /4865.5k × /6468.4%13

Recent changes

Announcements that started or stopped since 11th Oct 2026.

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