AS25577 — C4L-AS

Network type: hosting

AS25577 announces 52 IPv4 prefixes covering 48,640 addresses and 1 IPv6 prefixes.

About this network

The AS handle C4L-AS is held by Mainframe & Cybernetic Systems Limited.

What it's used for

• The address space carries hosting and business services, evidenced by netnames such as UK-FRAME-20040922 and UK-FRAME-20120705 associated with the registrant.
• The network announces 48640 IPv4 addresses across 60 prefixes and 1 IPv6 prefix, while maintaining 101 observed neighbours, a ratio that suggests a transit or service provider role rather than a simple access network.

Notable

• All sampled registrants for the largest prefixes are listed as MAINFRAME & CYBERNETIC SYSTEMS LIMITED, which aligns with the AS holder.
• The address inventory is heavily concentrated in the 84.45.0.0/16 range, with multiple /19, /20, and /21 blocks, alongside smaller /22 and /23 allocations from other ranges like 5.133.0.0/16 and 81.27.0.0/16.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.133.184.0/22
• 5.133.188.0/23
• 5.133.191.0/24
• 31.3.208.0/24
• 31.3.211.0/24
• 31.3.212.0/23
• 31.3.221.0/24
• 31.3.223.0/24
• 37.58.24.0/22
• 37.58.29.0/24
• 77.73.11.0/24
• 77.73.15.0/24
• 78.40.56.0/23
• 78.40.61.0/24
• 81.27.64.0/24
• 81.27.66.0/23
• 81.27.72.0/23
• 81.27.75.0/24
• 81.27.76.0/24
• 81.27.80.0/22
• 81.27.87.0/24
• 81.27.88.0/21
• 82.197.72.0/24
• 84.45.8.0/22
• 84.45.12.0/23
• 84.45.14.0/24
• 84.45.16.0/21
• 84.45.24.0/22
• 84.45.28.0/23
• 84.45.32.0/20
• 84.45.48.0/23
• 84.45.51.0/24
• 84.45.52.0/22
• 84.45.56.0/21
• 84.45.64.0/18
• 85.159.88.0/24
• 85.159.90.0/23
• 85.159.95.0/24
• 109.68.64.0/23
• 109.68.68.0/24
• 109.104.96.0/24
• 109.104.98.0/24
• 109.104.100.0/23
• 109.104.105.0/24
• 109.104.112.0/24
• 109.104.114.0/24
• 109.104.116.0/22
• 109.104.122.0/23
• 109.104.124.0/22
• 178.251.233.0/24
• 178.251.239.0/24
• 185.5.88.0/22
• 2001:9d8::/32

Upstream networks

• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS3223 Voxility LLP
• AS50304 Blix Solutions AS
• AS12552 GlobalConnect AB
• AS3303 Swisscom (Schweiz) AG
• AS29169 GANDI SAS
• AS4637 Telstra Global
• AS48185 team.blue NV
• AS24482 SG.GS
• AS57463 NetIX Communications JSC
• AS50300 CustodianDC Limited
• AS37721 Virtual Technologies & Solutions
• AS17639 Converge ICT Solutions Inc.
• AS3741 Dimension Data
• AS48362 Stadtwerke Feldkirch
• AS12779 IT.Gate S.p.A.
• AS37100 SEACOM Limited
• AS31500 Global Network Management Inc
• AS9505 Taiwan Internet Gateway
• AS8218 Zayo Infrastructure France SA

Downstream networks

• AS31708 Coreix Ltd
• AS49485 High Availability Hosting Limited
• AS59493 Cudo Ventures Ltd
• AS44934 Arachsys Internet Services Ltd
• AS203035 Xara Computers (UK) Ltd
• AS205434 BE SLOUGH DC UK LIMITED
• AS51572 Cerulean Solutions Limited
• AS50882 Maxnett Ltd.
• AS206626 Professional Software Design Ltd

Adjacent networks

• AS31708 Coreix Ltd
• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.
• AS6939 Hurricane Electric LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS49485 High Availability Hosting Limited
• AS50304 Blix Solutions AS
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions
• AS3223 Voxility LLP
• AS4637 Telstra Global
• AS37100 SEACOM Limited
• AS50300 CustodianDC Limited
• AS57463 NetIX Communications JSC
• AS12552 GlobalConnect AB
• AS29169 GANDI SAS
• AS48185 team.blue NV
• AS48362 Stadtwerke Feldkirch
• AS17639 Converge ICT Solutions Inc.
• AS3741 Dimension Data
• AS12779 IT.Gate S.p.A.
• AS205434 BE SLOUGH DC UK LIMITED
• AS59493 Cudo Ventures Ltd
• AS44934 Arachsys Internet Services Ltd
• AS203035 Xara Computers (UK) Ltd

Internet exchanges

• LINX LON1 — London, United Kingdom
• London Network Access Point — London, United Kingdom