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AS218625Communication Dynamics Ltd

United KingdomRegistryRIPE NCC

As of 24th October 2026, AS218625 (Communication Dynamics Ltd), a network registered in the United Kingdom with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses. By IPv4 address space that makes it the 48,613th-largest of the 79,671 networks we see originating IPv4, and the 1,370th-largest of 2,080 in the United Kingdom. It is seen behind 1 upstream network, most often AS2856 (British Telecommunications). 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

2

IPv6 prefixes

0

IPv4 addresses

512

IPv6 /64s

0

Upstream graph

The networks AS218625 is seen behind, one and two hops out, drawn from real AS paths.

AS218625Toward the internet core
Upstream graph for AS218625: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS218625Communication Dyn…This networkAS2856British Telecommu…AS5400British Telecommu…AS9002RETN Limited

Networks observed one and two hops upstream of AS218625 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS218625
NetworkCountryRelationshipPathsVantage pts
AS2856British TelecommunicationsGBPeer15276

Prefixes

The largest blocks AS218625 originates, widest first.

Largest prefixes originated by AS218625
PrefixAddressesVisibility
87.254.24.0/2425676/76
188.220.51.0/2425676/76

Routing health

How AS218625'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

Recent changes

Announcements that started or stopped since 24th Sept 2026.

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