Web4U s.r.o.

Data as of 2026-10-18
BGP inherited
This organisation
Netblocks16 · 5,120 IPv4 addresses
IPv6 3 prefixes (largest 2001:1568::/32)
Record ID250173862
RegistryBGP
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (16)

⬇ export CSV
CIDR Org name Registry Status Confidence
81.91.80.0/21 Web4U s.r.o. BGP ANNOUNCED ● high
81.91.80.0/20 Web4U s.r.o. BGP ANNOUNCED ● high
81.91.88.0/21 Web4U s.r.o. BGP ANNOUNCED ● high
185.14.224.0/22 Web4U s.r.o. BGP ANNOUNCED ● high
185.14.224.0/23 Web4U s.r.o. BGP ANNOUNCED ● high
2001:1568::/33 Web4U s.r.o. BGP ANNOUNCED ● high
2001:1568::/32 Web4U s.r.o. BGP ANNOUNCED ● high
2001:1568:8000::/33 Web4U s.r.o. BGP ANNOUNCED ● high
81.91.80.0/26 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.81.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.82.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.83.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.84.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.85.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.86.0/23 Web4U s.r.o. RIPE ASSIGNED PA ● low
81.91.90.0/24 Web4U s.r.o. RIPE ASSIGNED PA ● low

IPv6 ranges (3)

CIDR
2001:1568::/32
2001:1568:8000::/33
2001:1568::/33

Footprint over time

17 weekly snapshots · JSON
19 0 netblocks since 2026-07-05
2026-07-05 peak 19 2026-10-18

Other domains hosted in this network

what's this?
svetnohavic.sk papion.cz nihongo.cz sport4people.cz myslivost-lovectvi.cz svetkalhot.cz svetbot.cz zimni-plavani.info atlasfirem.info stavlex.cz najdiwellness.cz elektro-slevy.cz

Network trust

what's this?
RPKI hygiene: A how networks compare →
100.0% of checked blocks have valid RPKI ROA coverage (19 of 19)
No discrepancies found among checked blocks.

NIC Handles

AS39790 DUMY-RIPE DUMY-RIPE MNT-WEB4U MNT-WEB4U ORG-WS296-RIPE RIPE-NCC-HM-MNT