Autonomous system
AS41230 ASK4
Residential RIPE
Summary
ASK4
isp residential eyeball fiber
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 6 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.224.104 |
| London Network Access Point | London, United Kingdom | 5.57.80.184 |
| LINX Manchester | Manchester, United Kingdom | 195.66.244.23 |
| Megaport Frankfurt IX | Frankfurt, Germany | 62.69.146.122 |
| Megaport Dusseldorf IX | Düsseldorf, Germany | 194.146.118.152 |
| Leeds Internet Exchange | Leeds, United Kingdom | 91.217.231.19 |
Transit providers
21 upstream, 4 downstream and 37 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 12 prefixes · 88.32K addresses IPv6 7 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 19 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS41230- Registry name
- ASK4
- Registrant
- MNT-ASK4
- Abuse contact
- abuse@ask4.com
- Registered
- 2006-07-05
- Last changed
- 2024-03-07
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 23 valid, 0 with no ROA
- ROAs
- 26 authorising AS41230
- ASPA
- no ASPA record
- IRR
- 78% registered · 18 of 23 announcements
- Route objects
- 33 naming AS41230
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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