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Autonomous System

AS51184 · Fonira Telekom GmbH

Overview

AS51184 is announced on the Internet: RIPE RIS route collectors currently see 10 IPv4 prefixes and 5 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 13,824 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 62 upstream neighbours (transit providers or peers) and 1 downstream neighbour (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH (AS1764), and Nessus GmbH (AS47692). AS51184 was assigned by RIPE NCC, and its registration country is Austria.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 5:26 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 217.116.176.1

The trace goes to 217.116.176.1, the first address of 217.116.176.0/20. 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 (10 prefixes)

PrefixAddresses
5.180.152.0/221,024
91.206.8.0/23512
116.204.196.0/221,024
178.251.64.0/212,048
185.17.12.0/221,024
185.68.248.0/221,024
185.128.244.0/221,024
185.129.172.0/221,024
193.238.236.0/221,024
217.116.176.0/204,096

IPv6 prefixes (5 prefixes)

Prefix
2001:1b98::/32
2a02:1748::/32
2a06:d180::/29
2a06:d500::/29
2a0c:ad40::/29

Neighbours

Upstreams (transit or peers) (62)

ASNetworkVisibility
AS6939Hurricane Electric LLC44,928
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH42,730
AS47692Nessus GmbH36,620
AS7195EDGEUNO S.A.S2,959
AS14840BR.Digital Telecom1,366
AS4230CLARO S.A.1,217
AS137409GSL Networks Pty LTD951
AS20485Joint Stock Company TransTeleCom932
AS9002RETN Limited890
AS7713PT Telekomunikasi Indonesia615
AS20764CJSC RASCOM549
AS6663Euroweb Romania S.R.L.501
AS6797GlobalConnect AB451
AS37100SEACOM Limited403
AS5405Inter.link GmbH372
AS17557Pakistan Telecommunication Company Limited272
AS20562Broadband Hosting B.V.245
AS35280F5 Networks SARL239
AS8966EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC212
AS13030Init7 (Switzerland) Ltd.200
AS24961WIIT AG157
AS64049Reliance Jio Infocomm Pte Ltd Singapore123
AS6204INTERKVM HOST SRL118
AS50673Serverius Holding B.V.113
AS205103Telegraph42 Management GmbH113
AS60171AFR-IX TELECOM S.A.99
AS1267WIND TRE S.P.A.83
AS28716Retelit Digital Services S.p.A.82
AS35625Eurofiber France SAS81
AS25091IP-Max SA77

The 30 most visible of 62.

Downstreams (customers) (1)

ASNetworkVisibility
AS39564Kernnetz Invent GmbH276

1,426 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.