asn.dev

Autonomous system

AS21434 CLARIANT 4900 Langenthal

Unclassified RIPE

IPv4 addresses 512 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly CH
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Clariant

Switzerland · AI-generated

business chemical corporate switzerland

CLARIANT is the autonomous system for Clariant International Ltd., a Swiss multinational speciality chemical company.

What it's used for

  • The address space carries internal corporate infrastructure, evidenced by netnames CLARIANT-B2B and CLARIANT-PARTNERS registered to Clariant International Ltd.
  • The AS announces 512 IPv4 addresses across 2 prefixes in Switzerland, with only 1 observed neighbour, indicating a small, isolated corporate network rather than a transit or access provider.

Notable

  • Registrants for both announced prefixes match the AS holder, Clariant International Ltd., confirming direct ownership of the address space.
  • Clariant AG was formed in 1995 as a spin-off from Sandoz, establishing its identity as a distinct speciality chemical entity.
  • The inventory consists of two /24 blocks (193.110.85.0/24 and 194.50.172.0/24) with no IPv6 prefixes, reflecting a minimal, segmented corporate estate.

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

1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS48424GLOBITEL Sp. z o.o.118

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 2 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
CHSwitzerland2

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21434
Registry name
clariant
Registrant
CLARIANT-MNT
Abuse contact
abuse.contacts@clariant.com
Registered
2001-12-10
Last changed
2017-11-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS21434
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
2 naming AS21434

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 1,784 prefixes, as published 2026-10-19. 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