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Autonomous System

AS25234 · ACTIVE 24, s.r.o.

Overview

AS25234 is announced on the Internet: RIPE RIS route collectors currently see 5 IPv4 prefixes and 3 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 7,680 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 14 upstream neighbours (transit providers or peers) and 1 downstream neighbour (customers or networks it carries). Its most visible upstreams are ComSource ComSource s.r.o. (AS199803), Limestone Networks, Inc. (AS46475), and Hurricane Electric LLC (AS6939). AS25234 was assigned by RIPE NCC, and its registration country is Czechia.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 4:57 AM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 81.95.96.1, the first address of 81.95.96.0/20. 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 (5 prefixes)

PrefixAddresses
31.15.8.0/212,048
45.10.97.0/24256
81.95.96.0/204,096
185.12.196.0/221,024
185.71.159.0/24256

IPv6 prefixes (3 prefixes)

Prefix
2a02:250:3::/48
2a02:4a8::/32
2a10:bbc0::/32

Neighbours

Upstreams (transit or peers) (14)

ASNetworkVisibility
AS199803ComSource ComSource s.r.o.301
AS46475Limestone Networks, Inc.245
AS6939Hurricane Electric LLC223
AS29208Quantcom, a.s.139
AS58003Planeetta Internet Oy61
AS51013WebSupport s.r.o.25
AS41528Loopia AB14
AS8218Zayo Infrastructure France SA5
AS4455IX Reach Ltd2
AS14840BR.Digital Telecom2
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH1
AS6204INTERKVM HOST SRL1
AS6663Euroweb Romania S.R.L.1
AS263444Open X Tecnologia Ltda1

Downstreams (customers) (1)

ASNetworkVisibility
AS39570Loopia AB186

9 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.