Autonomous system
AS59455 CSG-AS
Unclassified RIPE NSP
Summary
Clearstream Technology
business nsp regional connectivity
CSG-AS is operated by Clearstream Technology ltd.
What it's used for
- The address space carries business connectivity and managed infrastructure, with netnames such as
UK-CSG-20101021,UK-DVS-SOFT-20141201, andUK-VYNS-20211029indicating distinct service segments. - The AS announces 5,888 IPv4 addresses across 8 prefixes and 2 IPv6 prefixes, while maintaining 61 observed neighbours; this ratio of moderate address inventory to high peering density indicates a regional network service provider (NSP) role.
- Traffic from this AS consists of business connectivity, private networks, cloud servers, and managed IT infrastructure for clients in South Wales and the wider UK.
Notable
- Registrants for the majority of prefixes are
Clearstream NOC; Clearstream Technology ltd, whileDVS Soft LtdandVOXYONDER NETWORK SERVICES UK LTDhold specific blocks, suggesting leased space or post-acquisition history. - The address inventory is fragmented across multiple /22, /23, and /24 blocks, including a single /24 registered to a
Private Customerwith the netnameNetutils.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.231.21 |
Transit providers
16 upstream, 1 downstream and 28 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 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 5.89K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 10 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS59455- Registry name
- CSG-AS
- Registrant
- CSG-MNT
- Abuse contact
- ripe@cloudcentres.co.uk
- Registered
- 2012-07-16
- Last changed
- 2026-02-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Clearstream Technology Ltd
- Network type
- NSP
- Scope
- Regional
- Traffic ratio
- Balanced
- Peering policy
- Open
- IRR as-set
AS-CSG- Present at
- 1 exchanges
- Facilities
- 1 facilities
- Website
- http://www.clearstreamgroup.co.uk/
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 · 10 valid, 0 with no ROA
- ROAs
- 10 authorising AS59455
- ASPA
- no ASPA record
- IRR
- 90% registered · 9 of 10 announcements 1 other origin
- Route objects
- 11 naming AS59455
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: 446 networks and 1,852 prefixes, as published 2026-10-27. 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