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Autonomous System

AS2027 ยท MilkyWan MilkyWan Association

Overview

AS2027 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 2,304 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 20 upstream neighbours (transit providers or peers) and 24 downstream neighbours (customers or networks it carries). Its most visible upstreams are FBW NETWORKS SAS (AS49434), SERVERD SAS (AS62000), and VERIXI SA (AS6696). AS2027 was assigned by ARIN, and its registration country is France.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 10:57 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 45.13.104.1, the first address of 45.13.104.0/22. 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
45.13.104.0/221,024
62.204.43.0/24256
80.67.167.0/24256
193.58.42.0/23512
195.20.209.0/24256

IPv6 prefixes (3 prefixes)

Prefix
2a0b:cbc0::/29
2a0e:e700::/31
2a0f:ce00::/29

Neighbours

Upstreams (transit or peers) (20)

ASNetworkVisibility
AS49434FBW NETWORKS SAS53,102
AS62000SERVERD SAS31,121
AS6696VERIXI SA20,705
AS35280F5 Networks SARL16,929
AS35625Eurofiber France SAS16,807
AS9002RETN Limited2,904
AS5405Inter.link GmbH1,270
AS13030Init7 (Switzerland) Ltd.239
AS60171AFR-IX TELECOM S.A.232
AS4455IX Reach Ltd132
AS3935131173 Services AB105
AS29075IELO-LIAZO SERVICES SAS100
AS25091IP-Max SA98
AS35661VIRTUA SYSTEMS SAS73
AS8218Zayo Infrastructure France SA70
AS6204INTERKVM HOST SRL52
AS6758-44
AS8298IPng Networks GmbH43
AS34177Celeste SAS43
AS15576NTS workspace AG34

Downstreams (customers) (24)

ASNetworkVisibility
AS215097SYSTEM DYNAMICS SARL592
AS207372LUNEO Association400
AS210851Nicolas Patouillard397
AS214563CLAIS JONATHAN trading as Infranat393
AS201818InitRD SASU312
AS197551Ameos SARL291
AS51144NICOLAS BOUFIDJELINE274
AS212970Teddy CHEREAU273
AS212037Marc Provost270
AS203062Alexandre Roux268
AS213935-267
AS206983-261
AS213372-247
AS216428-226
AS212971-203
AS206059-162
AS57797-127
AS200259-82
AS209097-76
AS212977-73
AS213253-72
AS215581-43
AS12654-31
AS212895Johannes Ernst14

593 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.