AS57154 Stadtwerke Konstanz GmbH

Germany SWKN RIPE 7 IPv4 prefixes 1 IPv6 prefix

IPv4 addresses

16,640

IPv6 /48 networks

65,536

RPKI

7 valid1 no ROA

Peers and downstreams

Holder

AS name: SWKN
Description: Stadtwerke Konstanz GmbH
Organisation: Stadtwerke Konstanz GmbH
Registered in: Konstanz, Germany
Abuse contact: abuse@tk-bodensee.net
Assigned: 2011-08-04
Registered: 2011-08-05
Record last changed: 2026-02-17 13:05 UTC

185.36.44.0/22 185.80.168.0/22 193.102.25.0/24 213.152.96.0/19 31.47.80.0/21 5.10.8.0/21 88.133.248.0/21

AS553	Belwue BELWUE
AS559	SWITCH Switch
AS1103	SURF B.V. SURFNET-NL
AS1140	Stichting Internet Domeinregistratie Nederland SIDN
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH NEXTLAYER-AS
AS1828	Unitas Global UNITAS
AS3216	PJSC "Vimpelcom" SOVAM-AS
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC) RIPE-NCC-AS
AS4230	CLARO S.A. AS4230
AS6057	Administracion Nacional de Telecomunicaciones AS6057
AS6204	TMRC GROUP SRL ZET-NET
AS6663	Euroweb Romania S.R.L. TTI-NET
AS6730	Sunrise GmbH SUNRISE
AS6777	Amsterdam Internet Exchange B.V. AMS-IX-RS
AS6797	GlobalConnect AB GLOBALCONNECT-NET
AS7195	EDGEUNO S.A.S AS7195
AS8298	IPng Networks GmbH IPNG
AS8529	Zain Omantel International FZ-LLC OMANTEL-AS
AS8966	EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC Etisalat-AS
AS9002	RETN Limited RETN-AS
AS9044	BSE Software GmbH SOLNET
AS12552	GlobalConnect AB GlobalConnect-AS12552
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
AS17639	Converge ICT Solutions Inc. CONVERGE-AS
AS18106	Viewqwest Pte Ltd VIEWQWEST-SG-AP
AS20766	Association "Gitoyen" GITOYEN-MAIN-AS
AS20932	Services Industriels de Geneve SIG-ST
AS24482	SG.GS SGGS-AS-AP
AS24961	WIIT AG MYLOC-AS
AS25091	IP-Max SA IP-Max
AS25160	Vorboss Limited VORBOSS
AS25220	equada network GmbH GLOBALNOC-AS
AS28917	Fiord Networks, UAB Fiord-AS
AS29075	IELO-LIAZO SERVICES SAS IELO
AS29140	Hostserver GmbH HOSTSERVER-AS
AS30844	Liquid Telecommunications Ltd LIQUID-AS
AS34019	Hivane Association HIVANE
AS34177	Celeste SAS CELESTE-AS
AS34288	Kantonsschule Zug AS34288
AS34927	iFog GmbH iFog-GmbH
AS35280	F5 Networks SARL F5
AS36236	NetActuate, Inc NETACTUATE
AS37100	SEACOM Limited
AS37468	Angola Cables
AS37497	Network Platforms (PTY) LTD
AS37721	Virtual Technologies & Solutions
AS39122	Blacknight Internet Solutions Limited BLACKNIGHT-AS
AS39351	31173 Services AB ESAB-AS
AS41327	Fiber Telecom S.p.A. FIBERTELECOM-AS
AS42541	Fiberby ApS FIBERBY
AS45489	Sri Lanka Telecom PLC, GLobal Peering SLT-GLOBAL
AS47147	Anexia Cloud Solutions GmbH AS-ANX
AS48185	team.blue NV team_blue
AS48362	Tkswf TKSWF-AS
AS48919	UACITY Ltd. UA-CITY-AS
AS49432	Dominic Schallert trading as schallert.com e.U. SCHALLERT-AS
AS49544	i3D.net B.V i3Dnet
AS49605	Digital Telecommunication Services S.r.l. DTS-AS
AS50300	CustodianDC Limited CUSTDC
AS50763	Robert McKay MCKAYCOM
AS51184	Fonira Telekom GmbH FONIRA
AS51185	MainStreaming SpA MAINSTREAMING-AS
AS56655	Gigahost AS GIGAHOST
AS56987	ABACLOUDA SAS AS-ABACLOUDA
AS59890	Kabel-TV Lampert GmbH & Co KG Kabel-TV-Lampert
AS61573	IP TELECOM AS61573
AS198150	SIACOM JSC SIACOM-AS
AS199524	G-Core Labs S.A. GCORE
AS199938	Netzwerge GmbH NETZWERGE
AS212483	LEVEL EIGHTY-SIX COMMUNICATIONS LTD level86
AS213241	TECHIT.BE SRL TECHIT
AS214410	Stadtwerke Waldkirch GmbH W-NET
AS263444	Open X Tecnologia Ltda AS263444
AS264409	Huge Solucoes Corporativas Ltda AS264409
AS271253	LINK BRASIL TELECOMUNICACOES LTDA AS271253

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade B · 87/100

partly	Prefixes covered by valid ROAs 7 of 8 announced prefixes are RPKI valid, 1 have no ROA.	22/25
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 4 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@tk-bodensee.net 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 2026-02-17.	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/57154"><img src="https://ip-fd.net/badge/asn/57154/health.svg" alt="AS57154 network health on IP-FD.net"></a>

Markdown

[![AS57154 network health](https://ip-fd.net/badge/asn/57154/health.svg)](https://ip-fd.net/asn/57154)

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

Routing changes

Last 30 days

2026-10-04 10:06 UTC	Neighbour gone	AS61049	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS50673	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS44901	peer
2026-10-04 10:06 UTC	Neighbour gone	AS39686	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS31027	peer
2026-10-04 10:06 UTC	Neighbour gone	AS22356	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS20764	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS20326	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS8758	upstream
2026-10-04 10:06 UTC	Neighbour gone	AS5405	upstream
2026-10-04 10:06 UTC	Relationship changed	AS12779	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS9044	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS9002	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS8966	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS8298	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS7195	upstream to peer
2026-10-04 10:06 UTC	New neighbour	AS6797	peer
2026-10-04 10:06 UTC	Relationship changed	AS6777	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS6730	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS6204	upstream to peer
2026-10-04 10:06 UTC	New neighbour	AS6057	peer
2026-10-04 10:06 UTC	New neighbour	AS60169	upstream
2026-10-04 10:06 UTC	Relationship changed	AS56655	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS4230	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS39351	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS37497	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS37468	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS37100	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS35280	upstream to peer
2026-10-04 10:06 UTC	New neighbour	AS34927	peer
2026-10-04 10:06 UTC	Relationship changed	AS34177	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS34019	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS3216	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS30844	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS29075	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS264409	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS263444	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS20766	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS1764	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS14840	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS12552	upstream to peer
2026-10-04 10:06 UTC	Relationship changed	AS1103	upstream to peer

WHOIS

aut-num:        AS57154
as-name:        SWKN
descr:          Stadtwerke Konstanz GmbH
org:            ORG-SKG3-RIPE
remarks:        
remarks:        
remarks:        
member-of:      AS3320:AS-AUTH-PILOT-BLACKHOLE-FROM-AS60169
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
remarks:        
admin-c:        SWKN-RIPE
tech-c:         SWKN1-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-SWKN
created:        2011-08-05T09:15:00Z
last-modified:  2026-02-17T13:05:45Z
source:         RIPE
% 16 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/57154

const res = await fetch('https://ip-fd.net/api/v1/asn/57154', {
  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/57154', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/57154');
curl_setopt($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/57154", 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.

AS6939	Hurricane Electric LLC HURRICANE
AS58115	SwissIX Internet Exchange SWISSIX-OUTREACH
AS60169	R-KOM Regensburger Telekommunikationsgesellschaft mbH GFIT-AS
AS205112	PHILUNET GmbH PHILUNET