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AS51783The Center of Dedicated Servers LLC

RussiaRegistryRIPE NCC

As of 27th September 2026, AS51783 (The Center of Dedicated Servers LLC), a network registered in Russia with RIPE NCC, originates 6 IPv4 prefixes covering 3.6k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 19,025th-largest of the 79,525 networks we see originating IPv4, and the 1,157th-largest of 4,942 in Russia. It is seen behind 1 upstream network, most often AS56534 (Comfortel Ltd.). 67% 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

6

IPv6 prefixes

3

IPv4 addresses

3.6k

IPv6 /64s

42.9B

Upstream graph

The networks AS51783 is seen behind, one and two hops out, drawn from real AS paths.

AS51783Toward the internet core
Upstream graph for AS51783: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51783The Center of Ded…This networkAS56534Comfortel Ltd.AS9002RETN LimitedAS31500Global Network Ma…

Networks observed one and two hops upstream of AS51783 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

adjacent networks

Upstreams
133%
Peers
267%
Downstreams
00%

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

Upstreams of AS51783
NetworkCountryRelationshipPathsVantage pts
AS56534Comfortel Ltd.RUPeer675144

Prefixes

The largest blocks AS51783 originates, widest first.

Largest prefixes originated by AS51783
PrefixAddressesVisibility
85.143.168.0/221k81/81
185.189.132.0/221k81/81
85.143.188.0/2351281/81
91.221.70.0/2351281/81
5.8.66.0/2425681/81
5.8.67.0/2425681/81
2a0b:e980::/2934.4B × /6463/64
2a11:77c5::/324.3B × /6463/64
2a11:bdc6::/324.3B × /6463/64

Routing health

How AS51783'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

  • Valid66.7%6
  • Invalid0.0%0
  • No ROA33.3%3

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 6 prefixes

IPv6 — 3 prefixes

  • /2934.4B × /6433.3%1
  • /324.3B × /6466.7%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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