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Autonomous System

AS21030 · Cluster LLC

Overview

AS21030 is announced on the Internet: RIPE RIS route collectors currently see 13 IPv4 prefixes and 1 IPv6 prefix originated by this network. Together, its IPv4 prefixes cover 3,328 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 33 upstream neighbours (transit providers or peers) and 126 downstream neighbours (customers or networks it carries). Its most visible upstreams are BiMajLink d.o.o. (AS62255), INETCOM CARRIER LLC (AS35598), and PJSC "Vimpelcom" (AS3216). AS21030 was assigned by RIPE NCC, and its registration country is Russia.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 11:53 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 62.204.57.1, the first address of 62.204.57.0/24. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (13 prefixes)

PrefixAddresses
62.204.57.0/24256
85.209.68.0/24256
85.209.69.0/24256
85.209.70.0/24256
85.209.71.0/24256
130.49.154.0/24256
185.40.154.0/24256
185.40.155.0/24256
185.253.21.0/24256
185.253.22.0/24256
185.253.23.0/24256
216.162.46.0/24256
217.119.139.0/24256

IPv6 prefixes (1 prefix)

Prefix
2a04:8580:ffff::/48

Neighbours

Upstreams (transit or peers) (33)

ASNetworkVisibility
AS62255BiMajLink d.o.o.618
AS35598INETCOM CARRIER LLC616
AS3216PJSC "Vimpelcom"220
AS202984Chernyshov Aleksandr Aleksandrovich166
AS48858JSC "ER-Telecom Holding"160
AS39572DataWeb Global Group B.V.129
AS20764CJSC RASCOM108
AS20485Joint Stock Company TransTeleCom90
AS206446CLOUD LEASE Ltd79
AS59627Docker LTD41
AS25091IP-Max SA18
AS33891Core-Backbone GmbH5
AS14840BR.Digital Telecom4
AS61049Exascale Ltd4
AS12389PJSC Rostelecom3
AS34927iFog GmbH3
AS47692Nessus GmbH3
AS49434FBW NETWORKS SAS3
AS8218Zayo Infrastructure France SA2
AS3935131173 Services AB2
AS41327Fiber Telecom S.p.A.2
AS42295-2
AS50673Serverius Holding B.V.2
AS62000SERVERD SAS2
AS137409GSL Networks Pty LTD2
AS6204INTERKVM HOST SRL1
AS9198JSC Kazakhtelecom1
AS9498BHARTI Airtel Ltd.1
AS15958CETIN Ltd. Belgrade1
AS21299-1

The 30 most visible of 33.

Downstreams (customers) (126)

ASNetworkVisibility
AS12567GAIJIN NETWORK LTD271
AS208981Data Center LLC95
AS39153JOINT-STOCK COMPANY "TELEPORT TELECOM"19
AS29049Delta Telecom Ltd14
AS29076Citytelecom LLC13
AS137409GSL Networks Pty LTD11
AS48989Cluster LLC10
AS61049Exascale Ltd10
AS55285Serverside.com8
AS209030AO Kaspersky Lab8
AS51248-7
AS49581Ferdinand Zink trading as Tube-Hosting5
AS57043HOSTKEY B.V.5
AS35048-4
AS43298StormNetworks Storm Networks LLC4
AS44112-4
AS215296-4
AS8732JSC Comcor3
AS41039-3
AS47379-3
AS50113SuperServersDatacenter FIRST SERVER LIMITED3
AS8491-2
AS34665-2
AS34959-2
AS38934-2
AS41925-2
AS42861-2
AS43031V-LAN OOO2
AS43966-2
AS44050-2

The 30 most visible of 126.

17 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.