AS41230 — ASK4

Network type: residential

AS41230 announces 11 IPv4 prefixes covering 88,320 addresses and 7 IPv6 prefixes.

About this network

ASK4 (ASK4 Limited, Sheffield) is a UK managed-internet provider for multi-tenant residential buildings. This ASN carries the residents it connects.

What it's used for

• Home internet for residents of purpose-built student accommodation, build-to-rent, and co-living buildings, delivered as managed full-fibre and in-building WiFi.

Notable

• An "eyeball" network: addresses here are residents' home connections, i.e. end users, not servers.
• ASK4 specialises in multi-tenant living rather than open-market retail broadband, serving buildings across the UK and continental Europe.

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

Announced prefixes

• 31.205.0.0/16
• 45.81.120.0/22
• 45.154.248.0/22
• 78.109.176.0/20
• 81.23.48.0/20
• 176.119.145.0/24
• 185.134.128.0/22
• 185.134.136.0/22
• 185.134.144.0/22
• 185.198.228.0/22
• 213.143.0.0/19
• 2a00:1a10::/29
• 2a07:c300::/29
• 2a0e:2a40::/29
• 2a0e:2ac0::/29
• 2a0e:5680::/29
• 2a0f:dd00::/29
• 2a10:d00::/29

Upstream networks

• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS24482 SG.GS
• AS33891 Core-Backbone GmbH
• AS50304 Blix Solutions AS
• AS50300 CustodianDC Limited
• AS48185 team.blue NV
• AS6461 Zayo Bandwidth
• AS57463 NetIX Communications JSC
• AS3741 Dimension Data
• AS37100 SEACOM Limited
• AS3303 Swisscom (Schweiz) AG
• AS12552 GlobalConnect AB
• AS37721 Virtual Technologies & Solutions
• AS48362 Stadtwerke Feldkirch
• AS12779 IT.Gate S.p.A.
• AS17639 Converge ICT Solutions Inc.
• AS3216 PJSC "Vimpelcom"
• AS20562 Broadband Hosting B.V.

Downstream networks

• AS30933 KDA WEB SERVICES LTD
• AS206049 Communicate Technology LTD
• AS8916 Portfast Ltd
• AS21396 NetConnex Broadband Ltd.

Adjacent networks

• AS1299 Arelion Sweden AB
• AS2914 NTT America, Inc.
• AS30933 KDA WEB SERVICES LTD
• AS6939 Hurricane Electric LLC
• AS8916 Portfast Ltd
• AS206049 Communicate Technology LTD
• AS34549 meerfarbig GmbH & Co. KG
• AS21396 NetConnex Broadband Ltd.
• AS50304 Blix Solutions AS
• AS24482 SG.GS
• AS48185 team.blue NV
• AS57463 NetIX Communications JSC
• AS50300 CustodianDC Limited
• AS37721 Virtual Technologies & Solutions
• AS48362 Stadtwerke Feldkirch
• AS12552 GlobalConnect AB
• AS37100 SEACOM Limited
• AS3741 Dimension Data
• AS17639 Converge ICT Solutions Inc.
• AS33891 Core-Backbone GmbH
• AS12779 IT.Gate S.p.A.
• AS3303 Swisscom (Schweiz) AG
• AS29075 IELO-LIAZO SERVICES SAS
• AS3216 PJSC "Vimpelcom"
• AS4637 Telstra Global

Internet exchanges

• LINX LON1 — London, United Kingdom
• London Network Access Point — London, United Kingdom
• LINX Manchester — Manchester, United Kingdom
• Megaport Frankfurt IX — Frankfurt, Germany
• Megaport Dusseldorf IX — Düsseldorf, Germany
• Leeds Internet Exchange — Leeds, United Kingdom