Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS39790

Announcement observedRIPE NCC

Web4U s.r.o. · WEB4U

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/22/2026, 03:50:48Snapshot expired

View network topology RDAP registration

ASN: AS39790
Registration country: Czechia
Name: Web4U s.r.o.
Abbreviation: WEB4U
Registration date: 4/25/2006, 12:37:01
Status: Announcement observed
RIR: RIPE NCC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
185.14.224.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/22/2026, 00:00:00	✓	×	Currently valid
185.14.224.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/22/2026, 00:00:00	✓	×	Currently valid
81.91.80.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/22/2026, 00:00:00	✓	×	Currently valid
81.91.80.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/22/2026, 00:00:00	✓	×	Currently valid
81.91.88.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/19/2026, 00:00:00	10/22/2026, 00:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Web4U s.r.o.
RIR: RIPE NCC
Registration country: Czechia
Registration date: 4/25/2006, 12:37:01
Abuse contact: abuse@web4u.cz

Snapshot trend

10/22/2026, 03:50:485 v43 v611 Upstream · 5 Uncertain

10/3/2026, 07:30:255 v43 v613 Upstream · 9 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn