AS51159 — THINKSYSTEMSUK-ASN CT1 Technologies Ltd

Network type: hosting

AS51159 announces 5 IPv4 prefixes covering 2,304 addresses and 0 IPv6 prefixes.

About this network

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.com and cloudspaceuk.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.

Announced prefixes

• 91.142.134.0/24
• 91.228.115.0/24
• 91.239.124.0/23
• 185.62.84.0/22
• 194.187.252.0/24

Upstream networks

• AS60800 Netwise Hosting Ltd

Adjacent networks

• AS60800 Netwise Hosting Ltd

Routing security

• RPKI: 5 valid, 0 invalid and 0 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-4D-DC-LINX, AS-CTBC-TOOLS-11, AS-EUNGB, AS-MZIMA-CUSTOMERS, AS-NETWISE.

Internet exchanges

• LINX LON1 — London, United Kingdom