Autonomous system
AS43155 SW-BIELEFELD-AS
Unclassified RIPE
Summary
Stadtwerke Bielefeld
municipal utility germany broadband
The AS handle SW-BIELEFELD-AS is held by Stadtwerke Bielefeld GmbH.
What it's used for
- The address space carries municipal utility infrastructure, evidenced by netnames
DE-STADTWERKE-20150506andSTADTWERKE-BIELEFELDregistered to Stadtwerke Bielefeld GmbH. - The network announces 1536 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 2 observed neighbours, indicating a small-scale access or internal corporate estate rather than a transit provider.
- Traffic from this AS consists of broadband services and internal network operations for the municipal utility, serving local subscribers and office workers in Bielefeld.
Notable
- Registrants for both announced prefixes agree with the announcer, listing Stadtwerke Bielefeld GmbH, SWB Netzwerk, and Abuse-C Role.
- The address inventory is compact, consisting of two IPv4 blocks (185.99.52.0/22 and 91.194.108.0/23) and one IPv6 block (2a06:1080::/29), typical for a regional municipal utility.
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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 1.54K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS43155- Registry name
- SW-BIELEFELD-AS
- Registrant
- HB12603-MNT
- Abuse contact
- abuse@stadtwerke-bielefeld.de
- Registered
- 2007-06-15
- Last changed
- 2022-05-18
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 4 with no ROA
- ROAs
- 0 authorising AS43155
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 4 naming AS43155
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 442 networks and 1,772 prefixes, as published 2026-10-15. 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