Autonomous system
AS205394 CSLDUAL-AS
Unclassified RIPE Enterprise
Summary
CSL (DualCom) Limited
business enterprise uk
The AS handle CSLDUAL-AS is held by CSL (DualCom) Limited.
What it's used for
- The address space carries corporate infrastructure, evidenced by netnames such as
UK-CSLDUALCOM-20110120andUK-CSLDUALCOM-20161104registered to the same entity. - The AS announces 5,632 IPv4 addresses across 6 prefixes and 3 IPv6 prefixes, with 9 observed neighbours, indicating a small-scale enterprise network rather than a transit or large access provider.
- Traffic from this AS consists of internal corporate endpoints and office workers, as CSL (DualCom) Limited is a private limited company based in the United Kingdom.
Notable
- All registrants for the announced prefixes are
CSL (DualCom) Limited, matching the AS holder. - The address inventory is finely subdivided into six distinct IPv4 blocks, consistent with site-by-site segmentation for an internal 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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
8 upstream, 0 downstream and 11 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 5.63K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 10 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS205394- Registry name
- CSLDUAL-AS
- Registrant
- CSL (DualCom) Limited
- Abuse contact
- ithelpdesk@csldual.com
- Registered
- 2017-09-06
- Last changed
- 2024-06-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- CSL (DualCom)
- Also known as
- CSL Group
- Network type
- Enterprise
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- IRR as-set
RIPE::AS-CSLDUAL- Website
- https://www.csl-group.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 23 valid, 0 with no ROA
- ROAs
- 10 authorising AS205394
- ASPA
- no ASPA record
- IRR
- 100% registered · 23 of 23 announcements
- Route objects
- 39 naming AS205394
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: 448 networks and 1,849 prefixes, as published 2026-10-30. 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