subnet.im

AS34555C.C.S. (Leeds) Ltd

United KingdomRegistryRIPE NCCTypeContent

As of 11th November 2026, AS34555 (C.C.S. (Leeds) Ltd), a content network registered in the United Kingdom with RIPE NCC, originates 17 IPv4 prefixes covering 21.5k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 6,864th-largest of the 80,747 networks we see originating IPv4, and the 192nd-largest of 2,122 in the United Kingdom. It is seen behind 29 upstream networks, most often AS2914 (NTT America, Inc.) and AS174 (Cogent Communications, LLC), and in front of 5 downstream networks. Every one of its announcements has 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

17

IPv6 prefixes

1

IPv4 addresses

21.5k

IPv6 /64s

4.3B

Upstream graph

The networks AS34555 is seen behind, one and two hops out, drawn from real AS paths.

AS34555Toward the internet core
Upstream graph for AS34555: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS34555C.C.S. (Leeds) LtdThis networkAS174Cogent Communicat…AS2914NTT America, Inc.AS6939Hurricane Electri…AS9002RETN LimitedAS13030Init7 (Switzerlan…AS151326DCConnect Communi…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS1299Arelion (fka. Tel…AS20130Depaul UniversityAS3356Lumen (Level 3)AS6667Elisa Oyj

Networks observed one and two hops upstream of AS34555 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

152

adjacent networks

Upstreams
2919%
Peers
11878%
Downstreams
53%

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

Upstreams of AS34555
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer65167
AS174Cogent Communications, LLCUSPeer28735
AS9002RETN LimitedGBPeer744
AS13030Init7 (Switzerland) Ltd.CHPeer705
AS6939Hurricane Electric LLCUSPeer7013
AS18106Viewqwest Pte LtdSGPeer442
AS25091IP-Max SACHPeer402
AS49544i3D.net B.VNLPeer232
AS41811CONVERGENCE (GROUP NETWORKS) LIMITEDGBPeer231
AS35280F5 Networks SARLFRPeer221

Prefixes

The largest blocks AS34555 originates, widest first.

Largest prefixes originated by AS34555
PrefixAddressesVisibility
78.158.32.0/204.1k76/76
194.12.0.0/204.1k76/76
31.6.72.0/212k76/76
77.95.176.0/212k76/76
178.248.32.0/212k76/76
188.92.232.0/212k76/76
91.203.72.0/221k76/76
185.4.240.0/221k76/76
185.7.148.0/221k76/76
31.24.216.0/2425676/76

Routing health

How AS34555'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

  • Valid100.0%18
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 17 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS34555 started or stopped in this period.

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