Autonomous system
AS51159 THINKSYSTEMSUK-ASN
Hosting RIPE
Summary
Think Systems UK
hosting dedicated uk
The AS handle THINKSYSTEMSUK-ASN is held by Think Systems UK Ltd.
What it's used for
- The address space carries dedicated server and cloud infrastructure, evidenced by reverse DNS entries for
thinkdedicated.comandcloudspaceuk.co.uk. - The network announces 2304 IPv4 addresses across 5 prefixes with a single observed neighbour, indicating a hosting or content provider role rather than a transit carrier.
- Traffic from this AS consists of web servers, dedicated hosting endpoints, and cloud services operated by Think Systems UK.
Notable
- Registrants for the majority of prefixes are listed as CT1 Technologies Ltd, while the largest prefix (185.62.84.0/22) and one other (194.187.252.0/24) show registrants as CT1 Technologies Ltd and Think BV Limited respectively, suggesting a corporate restructuring or rebranding from CT1 Technologies to Think Systems UK.
- The inventory is composed of five distinct IPv4 blocks, with the largest being a /22 and the rest being /23 or /24 blocks.
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 | 195.66.225.185 |
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS60800 | Netwise Hosting Ltd | 293 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 5 prefixes · 2.30K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 5 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS51159- Registry name
- THINKSYSTEMSUK-ASN
- Registrant
- lir-uk-ct1technologies-1-MNT
- Abuse contact
- abuse@ct1.tech
- Registered
- 2010-06-10
- Last changed
- 2026-02-27
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 5 valid, 0 with no ROA
- ROAs
- 5 authorising AS51159
- ASPA
- no ASPA record
- IRR
- 100% registered · 5 of 5 announcements
- Route objects
- 6 naming AS51159
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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 1,781 prefixes, as published 2026-10-16. 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