asn.dev

Autonomous system

AS13541 SIEMENS-DISW-WIV-B-ORW - Siemens Industry Software Inc.

Unclassified ARIN

IPv4 addresses 199K 7 prefixes
IPv6 prefixes 8 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Siemens Industry Software

United States · AI-generated

enterprise business infrastructure

Eight IPv6 prefixes at eight different lengths, which is what an aggregate with one hole punched in it looks like.

What it's used for

  • An engineering software company's network. 198,656 addresses across seven IPv4 prefixes, eight IPv6 prefixes, and two observed BGP neighbours.

Notable

  • The IPv6 announcements run 2620:107:f000::/41, /42, /43, /44, /45, /46, /47 and /48, each starting where the previous one ends.
  • IPv4 netnames include a numbered SIEMENS-DISW series and two that carry their own address, ORW-139-181-12-0-22 and ORW-139-181-17-0-24.
  • 192.94.38.0/23 is netname NET192, registrant Various Registries (Maintained by ARIN).
  • One prefix's registry lookup failed, so nothing is known about its registration here.
  • Eighteen addresses were queried for reverse DNS and none returned a name.

Interesting

  • A run of prefixes each half the size of the last, laid end to end, is the minimal way to express one large block with a single small piece removed. Something inside that range is routed elsewhere, and the routing table has to spell out everything except it.
  • A registrant naming several registries collectively marks address space older than the current allocation system, sitting in the same table as blocks the company clearly holds itself.
  • The ORW prefix reappears in the AS handle, so the letters identify a site or business unit rather than the company.

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

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

2 upstream, 0 downstream and 3 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS33490Comcast Cable Communications, LLC252
AS3356Level 3 Parent, LLC201

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-10, 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 · 199K addresses IPv6 8 prefixes

CountryNamePrefixes
USUnited States of America15

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS13541
Registry name
SIEMENS-DISW-WIV-B-ORW
Registrant
Siemens Industry Software Inc.
Abuse contact
gne-arin-abuse.sisw@siemens.com
Registered
1999-09-09
Last changed
2022-11-16
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 8 with no ROA
ROAs
0 authorising AS13541
ASPA
no ASPA record
IRR
75% registered · 6 of 8 announcements
Route objects
8 naming AS13541

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: 454 networks and 1,847 prefixes, as published 2026-11-11. 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