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Autonomous System

AS12843 · TelemaxX Telekommunikation GmbH

Overview

AS12843 is announced on the Internet: RIPE RIS route collectors currently see 53 IPv4 prefixes and 13 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 125,184 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 55 upstream neighbours (transit providers or peers) and 35 downstream neighbours (customers or networks it carries). Its most visible upstreams are Hurricane Electric LLC (AS6939), Cogent Communications, LLC (AS174), and NTT America, Inc. (AS2914). AS12843 was assigned by RIPE NCC, and its registration country is Germany.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 4:52 AM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 149.236.0.1, the first address of 149.236.0.0/16. 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 (53 prefixes)

PrefixAddresses
37.16.64.0/212,048
37.228.160.0/204,096
45.14.124.0/221,024
46.167.16.0/212,048
46.232.224.0/212,048
81.26.160.0/204,096
85.115.0.0/198,192
88.214.60.0/221,024
89.107.184.0/212,048
91.103.241.0/24256
91.103.242.0/24256
91.208.5.0/24256
93.189.152.0/212,048
109.109.200.0/212,048
149.236.0.0/1665,536
149.236.0.0/1732,768
149.236.9.0/24256
149.236.128.0/1732,768
185.9.176.0/221,024
185.18.92.0/221,024
185.25.132.0/221,024
185.28.228.0/221,024
185.30.156.0/221,024
185.34.184.0/221,024
185.53.204.0/221,024
185.53.204.0/23512
185.53.206.0/23512
185.55.100.0/221,024
185.55.100.0/23512
185.55.102.0/23512
185.60.57.0/24256
185.106.0.0/212,048
185.171.248.0/221,024
185.179.245.0/24256
185.202.196.0/221,024
193.17.197.0/24256
193.42.221.0/24256
193.47.152.0/24256
193.164.154.0/24256
193.202.119.0/24256
194.0.163.0/24256
194.24.242.0/24256
194.24.243.0/24256
194.45.103.0/24256
194.59.18.0/23512
194.59.20.0/221,024
194.145.114.0/24256
194.156.234.0/24256
194.180.204.0/24256
195.66.74.0/24256
212.114.32.0/212,048
213.144.0.0/198,192
217.25.137.0/24256

IPv6 prefixes (13 prefixes)

Prefix
2001:678:490::/48
2001:67c:12f0::/48
2001:67c:1928::/48
2001:67c:2388::/48
2a00:9300::/32
2a00:96e0::/32
2a01:50c0:1000::/36
2a01:8e20::/32
2a02:788::/29
2a04:4b00::/29
2a0a:dc40::/30
2a0e:e80::/29
2a0e:3200::/29

Neighbours

Upstreams (transit or peers) (55)

ASNetworkVisibility
AS6939Hurricane Electric LLC2,036
AS174Cogent Communications, LLC1,870
AS2914NTT America, Inc.1,232
AS9002RETN Limited222
AS3320Deutsche Telekom AG131
AS33891Core-Backbone GmbH100
AS5405Inter.link GmbH90
AS13030Init7 (Switzerland) Ltd.81
AS34927iFog GmbH79
AS35280F5 Networks SARL76
AS34549meerfarbig GmbH & Co. KG75
AS25091IP-Max SA74
AS35625Eurofiber France SAS71
AS4230CLARO S.A.64
AS34019Hivane Association62
AS8455atom86 BV54
AS29691-54
AS48362Stadtwerke Feldkirch54
AS34177Celeste SAS52
AS14840BR.Digital Telecom51
AS20485Joint Stock Company TransTeleCom49
AS20764CJSC RASCOM49
AS3935131173 Services AB48
AS8758Iway AG47
AS24961WIIT AG47
AS41327Fiber Telecom S.p.A.47
AS37468Angola Cables37
AS8298IPng Networks GmbH32
AS29632Netassist International EOOD30
AS12859BIT BV26

The 30 most visible of 55.

Downstreams (customers) (35)

ASNetworkVisibility
AS25579SKYTRON Communications GmbH & Co KG428
AS21234GRENKE Service GmbH420
AS205908wareconsult wareconsult Verwaltungs GmbH trading as wareconsult GmbH & Co. KG418
AS200941vioma vioma GmbH416
AS202040SCT Schiele GmbH360
AS29682Landeskreditbank Baden-Wuerttemberg - Foerderbank357
AS13054badenIT GmbH324
AS202661NetPlans GmbH302
AS44152adesso as a service GmbH265
AS3278SEW-EURODRIVE GmbH & Co KG263
AS31735-257
AS35309-257
AS41699-257
AS210424-257
AS215996-257
AS210795-256
AS20795-244
AS29236-235
AS205046-228
AS60481-216
AS20849-213
AS57224-208
AS205390-205
AS215775-203
AS207706-201
AS47372-193
AS202113-190
AS13040-152
AS58106-143
AS202462-122

The 30 most visible of 35.

84 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.