Autonomous system
AS39790 WEB4U
Hosting RIPE Content
Summary
Web4U
hosting business czech web
The AS handle WEB4U is operated by Web4U s.r.o.
What it's used for
- The address space carries web hosting and domain registration services, evidenced by netnames
CZ-WEB4USRO-20060425andCZ-WEB4USRO-20130108and reverse DNS entries pointing toweb4u.cz. - The network announces 5120 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with 22 observed neighbours, indicating a business-oriented hosting provider rather than a large-scale residential access network.
- Traffic from this AS consists of web hosting endpoints, domain name services, and associated cloud infrastructure for its customer base.
Notable
- Registrants for both announced IPv4 prefixes are consistently listed as Web4U s.r.o., matching the AS holder.
- Web4U s.r.o. was acquired by the Miss Group, a Perwyn-backed entity, expanding its portfolio in the web hosting and cloud infrastructure sector.
- The inventory includes a /20 and a /22 block, with the latter acquired in 2013 according to the netname date, reflecting organic growth of the hosting estate.
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 |
|---|---|---|
| NIX.CZ - Neutral Internet eXchange for the Czech Republic | Prague, Czech Republic | 91.210.16.89 |
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 2 prefixes · 5.12K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CZ | Czechia | 3 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS39790- Registry name
- WEB4U
- Registrant
- MNT-WEB4U
- Abuse contact
- abuse@web4u.cz
- Registered
- 2006-04-25
- Last changed
- 2026-07-22
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- WEB4U
- Also known as
- WEB4U
- Network type
- Content
- Scope
- Europe
- Traffic ratio
- Mostly Outbound
- Peering policy
- Open
- IRR as-set
AS-WEB4U- Present at
- 2 exchanges
- Facilities
- 2 facilities
- Website
- https://www.web4u.cz
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 8 valid, 0 with no ROA
- ROAs
- 3 authorising AS39790
- ASPA
- 3 declared providers
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 9 naming AS39790
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: 431 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