asn.dev

Autonomous system

AS57154 SWKN Stadtwerke Konstanz GmbH

Residential RIPE

IPv4 addresses 16.64K 7 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly DE
Exchanges 4 recorded by PCH
Upstreams 20 1 downstream
Flagged prefixes 0 none

Summary

Stadtwerke Konstanz

Germany · AI-generated

isp regional residential germany

SWKN is operated by Stadtwerke Konstanz GmbH, a municipal utility and regional internet service provider in Konstanz, Germany.

What it's used for

  • The address space carries residential and business customer traffic, evidenced by reverse DNS names such as cust-213-152-119-254.pools.tk-bodensee.net and 031-047-082-000.cust.tk-bodensee.net.
  • The AS announces 16,640 IPv4 addresses across 7 prefixes and 1 IPv6 prefix, with 94 observed routing neighbours, indicating a regional access network providing last-mile connectivity.
  • Traffic from this AS consists of subscriber eyeballs for broadband internet access, consistent with the operator's role as a regional ISP offering cable and DSL services.

Notable

  • Registrants for the majority of prefixes are consistent with the announcer, listing Stadtwerke Konstanz GmbH and Stadtwerke Konstanz ISP-Team; the prefix 193.102.25.0/24 is registered to Vanderlande Logistics GmbH under netname AEG-KN.
  • The address inventory is composed of multiple /21 and /22 blocks, reflecting a typical regional ISP footprint with segmented customer pools.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.

Interconnection

Peering at a glance

Full topology · Graph

Internet exchanges

Recorded at 4 exchanges in 3 countries, largest first.

ExchangeLocationTheir address
AMS-IX AmsterdamAmsterdam, Netherlands80.249.214.163
Megaport Frankfurt IXFrankfurt, Germany62.69.146.120
Rheintal Internet ExchangeEschen, Liechtenstein91.232.229.29
Stuttgarter Internet ExchangeStuttgart, Germany193.138.31.18

Transit providers

20 upstream, 1 downstream and 35 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS205112PHILUNET GmbH233
AS60169R-KOM Regensburger Telekommunikationsgesellschaft mbH69
AS6939Hurricane Electric LLC59
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)8
AS6730Sunrise GmbH8
AS24482SG.GS8
AS37721Virtual Technologies & Solutions8
AS48185team.blue NV8

All 20 upstreams →

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-02, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 7 prefixes · 16.64K addresses IPv6 1 prefixes

CountryNamePrefixes
DEGermany8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS57154
Registry name
SWKN
Registrant
MNT-SWKN
Abuse contact
abuse@tk-bodensee.net
Registered
2011-08-05
Last changed
2026-02-17
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
88% valid · 7 valid, 1 with no ROA
ROAs
7 authorising AS57154
ASPA
no ASPA record
IRR
100% registered · 8 of 8 announcements
Route objects
14 naming AS57154

Reputation

Classification and threat

Residential Fixed-line consumer ISP. Addresses here are homes.

Spamhaus DROP

Not on ASN-DROP The network as a whole is not listed.

No DROP prefixes None of its announced space is on the DROP prefix list.

Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 449 networks and 1,846 prefixes, as published 2026-11-03. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.

FBI IC3

No IC3 indicators Nothing from the FBI IC3 feed.

IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.

Elsewhere

Cross-check