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Autonomous System

AS28876 · suec // dacor GmbH

Overview

AS28876 is announced on the Internet: RIPE RIS route collectors currently see 13 IPv4 prefixes and 6 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 31,744 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 65 upstream neighbours (transit providers or peers) and 10 downstream neighbours (customers or networks it carries). Its most visible upstreams are Core-Backbone GmbH (AS33891), Deutsche Telekom AG (AS3320), and Hurricane Electric LLC (AS6939). AS28876 was assigned by RIPE NCC, and its registration country is Germany.

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

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 5.100.0.1

The trace goes to 5.100.0.1, the first address of 5.100.0.0/18. 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
5.100.0.0/1816,384
5.100.0.0/198,192
5.100.0.0/24256
5.100.32.0/198,192
37.61.128.0/204,096
81.89.160.0/204,096
81.89.160.0/212,048
81.89.168.0/212,048
176.52.192.0/212,048
185.53.216.0/221,024
217.24.48.0/204,096
217.24.48.0/212,048
217.24.56.0/212,048

IPv6 prefixes (6 prefixes)

Prefix
2a00:9d80::/32
2a00:9d80::/33
2a00:9d80:8000::/33
2a00:9d81::/32
2a00:9d81::/33
2a00:9d81:8000::/33

Neighbours

Upstreams (transit or peers) (65)

ASNetworkVisibility
AS33891Core-Backbone GmbH1,257
AS3320Deutsche Telekom AG301
AS6939Hurricane Electric LLC224
AS34549meerfarbig GmbH & Co. KG25
AS13030Init7 (Switzerland) Ltd.22
AS4230CLARO S.A.20
AS5405Inter.link GmbH20
AS29632Netassist International EOOD20
AS14840BR.Digital Telecom19
AS20485Joint Stock Company TransTeleCom19
AS34019Hivane Association19
AS48362Stadtwerke Feldkirch19
AS35280F5 Networks SARL17
AS8298IPng Networks GmbH16
AS34927iFog GmbH16
AS35625Eurofiber France SAS16
AS41327Fiber Telecom S.p.A.16
AS25091IP-Max SA15
AS47147Anexia Cloud Solutions GmbH15
AS34177Celeste SAS14
AS12779-13
AS37468Angola Cables12
AS29691Nine Internet Solutions AG11
AS7195EDGEUNO S.A.S10
AS8758Iway AG10
AS20764CJSC RASCOM10
AS24961WIIT AG10
AS37100SEACOM Limited10
AS3935131173 Services AB10
AS4455IX Reach Ltd9

The 30 most visible of 65.

Downstreams (customers) (10)

ASNetworkVisibility
AS50642DNCC GmbH596
AS29008Niedermayr IT GmbH540
AS24978Telenec Telekommunikation Neustadt GmbH408
AS50064TK Networks GmbH234
AS44974RegioNet Schweinfurt GmbH195
AS200062Optitrust Optitrust GmbH160
AS207749Staedtische Werke Ueberlandwerke Coburg GmbH96
AS205100F3 Netze e.V.19
AS44545CREALOGIX BaaS GmbH & Co. KG17
AS198570Stadtnetz Bamberg Gesellschaft fuer Telekommunikation mbH16

61 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.