AS42184 TKRZ Stadtwerke GmbH

Germany AS-TKRZ RIPE 13 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

18,688

IPv6 /48 networks

65,536

RPKI

14 valid0 no ROA

Peers and downstreams

146

Holder

AS name: AS-TKRZ
Description: TKRZ Stadtwerke GmbH
Organisation: TKRZ Stadtwerke GmbH
Registered in: Emsdetten, Germany
Abuse contact: abuse@tkrz.de
Assigned: 2007-01-09
Registered: 2007-01-10
Record last changed: 2026-09-11 11:30 UTC

178.251.8.0/21 185.124.232.0/22 185.143.168.0/22 185.153.140.0/22 185.64.168.0/22 185.72.200.0/22 188.64.248.0/21 194.15.152.0/22 194.49.22.0/24 45.82.124.0/22 88.218.84.0/22 89.251.128.0/20 91.190.224.0/21

AS553	Belwue BELWUE
AS559	SWITCH Switch
AS680	Verein zur Foerderung eines Deutschen Forschungsnetzes e.V. DFN
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS1267	WIND TRE S.P.A. ASN-WINDTRE
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH NEXTLAYER-AS
AS1828	Unitas Global UNITAS
AS3212	Telemach Slovenija d.o.o. TELEMACH
AS3214	xTom GmbH XTOM
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS4230	CLARO S.A. AS4230
AS4455	IX Reach Ltd BSO
AS5405	Inter.link GmbH INTERDOTLINK
AS6057	Administracion Nacional de Telecomunicaciones AS6057
AS6204	TMRC GROUP SRL ZET-NET
AS6424	EDGOO NETWORKS UNIPESSOAL LDA EDGOO
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6777	Amsterdam Internet Exchange B.V. AMS-IX-RS
AS6797	GlobalConnect AB GLOBALCONNECT-NET
AS7195	EDGEUNO S.A.S AS7195
AS7713	PT Telekomunikasi Indonesia telkomnet-as-ap
AS8218	Zayo Infrastructure France SA NEO-ASN
AS8298	IPng Networks GmbH IPNG
AS8454	FMO Flughafen Muenster/Osnabrueck GmbH FMO
AS8529	Zain Omantel International FZ-LLC OMANTEL-AS
AS8758	Iway AG IWAY
AS8888	xTom Pty Ltd XTOM
AS9044	BSE Software GmbH SOLNET
AS12577	MMC GmbH MMC-AT-AS
AS12637	SEEWEB s.r.l. SEEWEB
AS12779	IT.Gate S.p.A. ITGATE
AS12859	BIT BV NL-BIT
AS12969	Ljosleidarinn ehf Vodafone_Iceland
AS13237	euNetworks GmbH LAMBDANET-AS
AS14630	Invesco Group Services, Inc. INVESCO
AS14840	BR.Digital Telecom AS14840
AS14907	Wikimedia Foundation Inc. WIKIMEDIA
AS15547	netplus.ch SA NETPLUS
AS15605	Connesi s.p.a. CONNESI
AS15958	CETIN Ltd. Belgrade CETIN_doo_AS
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS20485	Joint Stock Company TransTeleCom TRANSTELECOM
AS20764	CJSC RASCOM RASCOM-AS
AS20766	Association "Gitoyen" GITOYEN-MAIN-AS
AS20932	Services Industriels de Geneve SIG-ST
AS21412	UAB "Cgates" CGATES-AS
AS24482	SG.GS SGGS-AS-AP
AS24889	Monzoon Networks AG MONZOON-AS
AS24961	WIIT AG MYLOC-AS
AS25091	IP-Max SA IP-Max
AS25160	Vorboss Limited VORBOSS
AS25220	equada network GmbH GLOBALNOC-AS
AS28716	Retelit Digital Services S.p.A. RETELIT-AS
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29140	Hostserver GmbH HOSTSERVER-AS
AS29504	Freenet Liberec, z.s. LBCFREE
AS29691	Nine Internet Solutions AG NINE
AS30844	Liquid Telecommunications Ltd LIQUID-AS
AS31510	Innsbrucker Kommunalbetriebe AG IKB-AS
AS34177	Celeste SAS CELESTE-AS
AS34288	Kantonsschule Zug AS34288
AS34800	Securebit AG SBAG
AS34927	iFog GmbH iFog-GmbH
AS35280	F5 Networks SARL F5
AS35360	Gargunet GARGUNET
AS35369	LINZ STROM GAS WAERME GmbH fuer Energiedienstleistungen und Telekommunikation LINZAG-TELEKOM-AS
AS35598	INETCOM CARRIER LLC INETCOM
AS35710	weber.digital GmbH WEBERCLOUD
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39249	Netassist International EOOD KICUA-AS
AS39351	31173 Services AB ESAB-AS
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS42541	Fiberby ApS FIBERBY
AS43397	items management GmbH trading as 'items GmbH & Co. KG' ITEMS
AS44901	Belcloud LTD belcloud
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS47147	Anexia Cloud Solutions GmbH AS-ANX
AS47692	Nessus GmbH NESSUS
AS48185	team.blue NV team_blue
AS48362	Tkswf TKSWF-AS
AS48919	UACITY Ltd. UA-CITY-AS
AS49544	i3D.net B.V i3Dnet
AS49552	OpenSource Training Ralf Spenneberg OST-SPE
AS49605	Digital Telecommunication Services S.r.l. DTS-AS
AS50300	CustodianDC Limited CUSTDC
AS50673	Serverius Holding B.V. Serverius-as
AS50763	Robert McKay MCKAYCOM
AS51184	Fonira Telekom GmbH FONIRA
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS51873	Arcade Solutions AG AS-ARCADE
AS56655	Gigahost AS GIGAHOST
AS56662	Eutpnet EUTPNET
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS57137	SIEVERS-SNC Beteiligungs GmbH sievers-snc
AS57777	Jeroen Massar MASSAR
AS58057	Securebit AG SECUREBIT
AS58299	Openfactory GmbH OPENFACTORY-AS
AS59890	Kabel-TV Lampert GmbH & Co KG Kabel-TV-Lampert
AS60171	AFR-IX TELECOM S.A. AFRIX-AS
AS61049	Exascale Ltd EXASCALE
AS61573	IP TELECOM AS61573
AS64475	Freifunk Frankfurt am Main e.V. FREIFUNK-FRANKFURT
AS137409	GSL Networks Pty LTD GSLNETWORKS-AS-AP
AS142271	EWS DS Networks Inc DOUBLESQUARE-AS-AP
AS196731	egeplast international GmbH egeplast
AS196932	RheiNet GmbH RHEINET
AS197759	Enapter AG XENODE-AS
AS198150	SIACOM JSC SIACOM-AS
AS198249	Ops One AG OPSONE
AS198385	AlpineDC SA AlpineDC
AS199524	G-Core Labs S.A. GCORE
AS199938	Netzwerge GmbH NETZWERGE
AS204702	Deutsche Windtechnik GmbH & Co. KG DWTS
AS204989	Rekers Digitaltechnik Beteiligungsgesellschaft mbH trading as Rekers Digitaltechnik GmbH & Co.KG rdt
AS205112	PHILUNET GmbH PHILUNET
AS206356	Freifunk Essen e.V. Freifunk-Essen
AS209823	Enki Multimedia EURL ENKI-AS
AS210035	Stiftung Mathias-Spital Rheine Stiftung_Mathias-Spital_Rheine
AS210937	Showfom
AS212024	Risson RISSON
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS212635	Jurrian van Iersel AS212635
AS213151	Christian Elsen CHRISELSEN
AS213241	TECHIT.BE SRL TECHIT
AS215756	C. H. Schmitz Beteiligungsgesellschaft mbH trading as Schmitz-Werke GmbH & Co. KG SCHMITZWERKE
AS263152	MIGO TELECOM AS263152
AS264479	Turbozone Internet AS264479
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade A · 90/100

pass	Prefixes covered by valid ROAs 14 of 14 announced prefixes are RPKI valid.	25/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 14 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@tkrz.de is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-09-11.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/42184"><img src="https://ip-fd.net/badge/asn/42184/health.svg" alt="AS42184 network health on IP-FD.net"></a>

Markdown

[![AS42184 network health](https://ip-fd.net/badge/asn/42184/health.svg)](https://ip-fd.net/asn/42184)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 10:39 UTC	Neighbour gone	AS264409	upstream
2026-10-04 10:39 UTC	Neighbour gone	AS205103	upstream
2026-10-04 10:39 UTC	Neighbour gone	AS52320	peer
2026-10-04 10:39 UTC	Neighbour gone	AS31027	peer
2026-10-04 10:39 UTC	Neighbour gone	AS22356	upstream
2026-10-04 10:39 UTC	Neighbour gone	AS4601	upstream
2026-10-04 10:39 UTC	New neighbour	AS8888	peer
2026-10-04 10:39 UTC	New neighbour	AS264479	peer
2026-10-04 10:39 UTC	New neighbour	AS57137	peer
2026-10-04 10:39 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS8758	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS8218	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS7713	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS7195	upstream to peer
2026-10-04 10:39 UTC	New neighbour	AS6797	peer
2026-10-04 10:39 UTC	Relationship changed	AS6777	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS61049	upstream to peer
2026-10-04 10:39 UTC	New neighbour	AS6057	peer
2026-10-04 10:39 UTC	Relationship changed	AS60171	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS56655	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS5405	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS50673	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS48362	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS47147	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS4455	upstream to peer
2026-10-04 10:39 UTC	New neighbour	AS4230	peer
2026-10-04 10:39 UTC	Relationship changed	AS41327	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS39249	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS35280	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS34927	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS34177	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS3356	downstream to upstream
2026-10-04 10:39 UTC	Relationship changed	AS30844	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS29691	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS28716	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS24961	upstream to peer
2026-10-04 10:39 UTC	New neighbour	AS24889	peer
2026-10-04 10:39 UTC	Relationship changed	AS212024	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS20766	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS20764	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS20485	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS15958	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 10:39 UTC	New neighbour	AS137409	peer
2026-10-04 10:39 UTC	Relationship changed	AS12779	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS1267	upstream to peer
2026-10-04 10:39 UTC	Relationship changed	AS12577	upstream to peer

WHOIS

aut-num:        AS42184
as-name:        AS-TKRZ
org:            ORG-JSG1-RIPE
remarks:        ====================================================
remarks:        TKRZ Stadtwerke GmbH
remarks:        AS42184
remarks:        located at AMS-IX
remarks:        located at DE-CIX FRA
remarks:        located at DE-CIX DUS
remarks:        located at DE-CIX HAM
remarks:        located at DE-CIX MUC
remarks:        located at OCIX DUS
remarks:        located at Peering.cz
remarks:        PeeringDB: https://as42184.peeringdb.com
remarks:        Looking-Glass: https://lg.tkrz.net
remarks:        Looking-Glass: https://bgp.tools/lg/42184
remarks:        ====================================================
remarks:        == Route Server Peerings ==
remarks:        DE-CIX Frankfurt Route Servers:
import-via:     AS6695 from AS-DECIX-CONNECTED accept AS-DECIX-CONNECTED
export-via:     AS6695 to AS-DECIX-CONNECTED announce AS-TKRZ
remarks:        --
remarks:        AMS-IX Route Servers:
import-via:     AS6777 from AS-AMS-IX-PEERS accept AS-AMS-IX-PEERS
export-via:     AS6777 to AS-ANY announce AS-TKRZ
remarks:        --
remarks:        OCIX Düsseldorf Route Servers:
import-via:     AS41692 from AS-OPENCARRIER accept AS-OPENCARRIER
export-via:     AS41692 to AS-OPENCARRIER announce AS-TKRZ
remarks:        --
remarks:        DE-CIX Hamburg Route Servers:
import-via:     AS43252 from AS-DECIX-HAM-CONNECTED accept AS-DECIX-HAM-CONNECTED
export-via:     AS43252 to AS-DECIX-HAM-CONNECTED announce AS-TKRZ
remarks:        --
remarks:        DE-CIX München Route Servers:
import-via:     AS47228 from AS-DECIX-MUC-CONNECTED accept AS-DECIX-MUC-CONNECTED
export-via:     AS47228 to AS-DECIX-MUC-CONNECTED announce AS-TKRZ
remarks:        --
remarks:        DE-CIX Düsseldorf Route Servers:
import-via:     AS56890 from AS-DECIX-DUS-CONNECTED accept AS-DECIX-DUS-CONNECTED
export-via:     AS56890 to AS-DECIX-DUS-CONNECTED announce AS-TKRZ
remarks:        --
remarks:        Peering.cz Route Servers:
import-via:     AS61195 from AS-PEERINGCZ-RS accept AS-PEERINGCZ-RS
export-via:     AS61195 to AS-PEERINGCZ-RS announce AS-TKRZ
remarks:        ====================================================
remarks:        == Transit ==
remarks:        Cogent Communications Inc.:
remarks:        --
remarks:        Arelion :
remarks:        --
remarks:        Deutsche Telekom AG:
member-of:      AS3320:AS-AUTH-PILOT-BLACKHOLE-FROM-AS41692
remarks:        --
remarks:        GTT Communications Inc.:
remarks:        --
remarks:        Lumen Technologies Inc.:
remarks:        --
remarks:        Core-Backbone GmbH:
remarks:        ====================================================
remarks:        == Customers ==
remarks:        FMO Flughafen Muenster/Osnabrueck GmbH:
remarks:        --
remarks:        items GmbH & Co. KG:
remarks:        --
remarks:        LIS Logistische Informationssysteme GmbH:
remarks:        --
remarks:        OpenSource Security GmbH:
remarks:        --
remarks:        SIEVERS GROUP:
remarks:        --
remarks:        egeplast international GmbH:
remarks:        --
remarks:        RheiNet GmbH:
remarks:        --
remarks:        Enapter AG:
remarks:        --
remarks:        teutel GmbH:
remarks:        --
remarks:        Deutsche Windtechnik Service GmbH & Co. KG:
remarks:        --
remarks:        Rekers Digitaltechnik GmbH & Co.KG:
remarks:        --
remarks:        Stiftung Mathias-Spital Rheine:
remarks:        --
remarks:        Schmitz-Werke GmbH + Co. KG:
remarks:        ====================================================
remarks:        == Private Network Interconnect ==
remarks:        Google LLC:
remarks:        --
remarks:        Amazon Inc:
remarks:        --
remarks:        Epcan GmbH:
remarks:        --
remarks:        WEBDISCOUNT GmbH & Co. KG:
remarks:        --
remarks:        WIIT AG (fka. myLoc Managed IT AG):
remarks:        --
remarks:        Stadtwerke Lübeck Digital GmbH:
remarks:        --
remarks:        Meta Platforms Inc.:
remarks:        --
remarks:        Netflix Streaming Services Inc.:
remarks:        --
remarks:        Stadtwerke Soest GmbH:
remarks:        --
remarks:        Exaring AG:
remarks:        --
remarks:        TELE AG:
remarks:        ====================================================
admin-c:        CS13905-RIPE
tech-c:         tSG20-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-TKRZ
created:        2007-01-10T08:53:37Z
last-modified:  2026-09-11T11:30:45Z
source:         RIPE
% 120 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/42184

const res = await fetch('https://ip-fd.net/api/v1/asn/42184', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/42184', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/42184');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/42184", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

AS174
AS1299	Arelion Sweden AB TWELVE99
AS3257	GTT Communications Inc. GTT-BACKBONE
AS3320	Deutsche Telekom AG DTAG
AS3356	Level 3 Parent, LLC LEVEL3
AS6939	Hurricane Electric LLC HURRICANE
AS9002	RETN Limited RETN-AS
AS13030	Init7 (Switzerland) Ltd. INIT7
AS29632	Netassist International EOOD NASSIST-AS
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS34019	Hivane Association HIVANE
AS34549	meerfarbig GmbH & Co. KG MEER-AS
AS35625	Eurofiber France SAS EUROFIBER-FRANCE
AS37497	Network Platforms (PTY) LTD