subnet.im

AS8220COLT

United KingdomRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS8220 (COLT), a transit carrier registered in the United Kingdom with RIPE NCC, originates 155 IPv4 prefixes covering 1.5M addresses and 19 IPv6 prefixes. By IPv4 address space that makes it the 351st-largest of the 79,480 networks we see originating IPv4, and the 8th-largest of 2,074 in the United Kingdom. It is seen behind 67 upstream networks, most often AS15576 (NTS workspace AG) and AS3356 (Lumen (Level 3)), and in front of 1,517 downstream networks. 91% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 99% 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

155

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: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS8220COLTThis networkAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS15576NTS workspace AGAS16552Tiggee LLCAS32590Valve CorporationAS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS34288Kantonsschule ZugAS51907Kanton ZugAS6939Hurricane 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

3,581

adjacent networks

Upstreams
672%
Peers
1,99756%
Downstreams
1,51742%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 67.

Upstreams of AS8220
NetworkCountryRelationshipPathsVantage pts
AS15576NTS workspace AGCHPeer109,4774
AS3356Lumen (Level 3)USPeer33,51384
AS1299Arelion (fka. Telia Carrier)SEPeer22,48455
AS32590Valve CorporationUSPeer18,9436
AS16552Tiggee LLCUSPeer16,8234
AS3491PCCW Global (HK) Ltd.HKPeer15,92649
AS6453TATA Communications (America) IncUSPeer14,213143
AS18106Viewqwest Pte LtdSGPeer13,9544
AS35280F5 Networks SARLFRPeer12,6856
AS7713PT Telkom Indonesia TbkIDPeer10,8304

Prefixes

All 174

The largest blocks AS8220 originates, widest first.

Largest prefixes originated by AS8220
PrefixAddressesVisibility
217.110.0.0/15131k81/81
57.133.0.0/1665.5k81/81
58.0.0.0/1665.5k81/81
62.23.0.0/1665.5k81/81
62.96.0.0/1665.5k81/81
80.169.0.0/1665.5k81/81
84.14.0.0/1665.5k81/81
136.225.0.0/1665.5k81/81
148.109.0.0/1665.5k81/81
213.61.0.0/1665.5k81/81

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

  • Valid91.4%159
  • Invalid0.0%0
  • No ROA8.6%15

Propagation

  • Globally propagated90% of full-feed peers or more98.9%172
  • Partially propagated40% to 90%1.1%2
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 155 prefixes

IPv6 — 19 prefixes

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

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS8220 started or stopped in this period.

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