CEZNET s.r.o.

Data as of 2026-08-16
BGP inherited
Cluster stats
Netblocks61 · 131,488 IPv4 addresses
IPv6 20 prefixes (largest 2a00:1800::/29)
Cluster ID222374440
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 26 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
87 0 netblocks since 2026-07-05
2026-07-05 peak 87 2026-08-16

IP Ranges (61)

showing 50 of 61 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
37.9.192.0/21 CEZNET s.r.o. BGP ANNOUNCED ● high
46.36.32.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
77.92.192.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
77.237.128.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
81.25.16.0/21 CEZNET s.r.o. BGP ANNOUNCED ● high
81.25.24.0/21 CEZNET s.r.o. BGP ANNOUNCED ● high
82.144.128.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
82.202.0.0/18 CEZNET s.r.o. BGP ANNOUNCED ● high
85.92.32.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
91.109.32.0/21 CEZNET s.r.o. BGP ANNOUNCED ● high
109.234.40.0/21 CEZNET s.r.o. BGP ANNOUNCED ● high
149.255.64.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
185.67.188.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.115.180.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.116.48.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.116.51.0/24 CEZNET s.r.o. BGP ANNOUNCED ● high
185.151.168.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.151.172.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.157.196.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.193.128.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.201.12.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
185.255.116.0/22 CEZNET s.r.o. BGP ANNOUNCED ● high
188.122.192.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
188.244.48.0/20 CEZNET s.r.o. BGP ANNOUNCED ● high
212.90.224.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
212.111.0.0/19 CEZNET s.r.o. BGP ANNOUNCED ● high
213.235.64.0/18 CEZNET s.r.o. BGP ANNOUNCED ● high
2a00:1800::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a00:1807::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a00:e580::/29 CEZNET s.r.o. BGP ANNOUNCED ● high
2a02:d00::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a02:25b0::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a03:1180::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a05:1200::/30 CEZNET s.r.o. BGP ANNOUNCED ● high
2a07:7a00::/29 CEZNET s.r.o. BGP ANNOUNCED ● high
2a0a:3340::/29 CEZNET s.r.o. BGP ANNOUNCED ● high
2a0a:4080::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
2a0a:b6c0::/32 CEZNET s.r.o. BGP ANNOUNCED ● high
185.115.180.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● medium
185.116.48.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● medium
185.116.50.0/24 CEZNET s.r.o. RIPE ASSIGNED PA ● medium
185.151.170.0/24 HAKO RIPE ASSIGNED PA ● medium
185.151.172.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● medium
185.151.174.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● medium
81.25.16.0/20 CEZNET s.r.o. RIPE ALLOCATED PA ● low
89.111.114.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● low
89.111.116.0/23 CEZNET s.r.o. RIPE ASSIGNED PA ● low
89.111.118.0/24 CEZNET s.r.o. RIPE ASSIGNED PA ● low
89.111.126.0/25 CEZNET s.r.o. RIPE ASSIGNED PA ● low
89.111.126.128/27 CEZNET s.r.o. RIPE ASSIGNED PA ● low

IPv6 ranges (20)

showing the 15 largest allocations
CIDR
2a00:1800::/29
2a00:e580::/29
2a02:d00::/29
2a07:7a00::/29
2a0a:3340::/29
2a0a:bdc0::/29
2a05:1200::/30
2a00:1800::/32
2a00:1807::/32
2a02:25b0::/32
2a02:d00::/32
2a03:1180::/32
2a0a:4080::/32
2a0a:b6c0::/32
2a01:a040:100::/40

Domains hosted in this network

what's this?
gtt-net.cz wms.cz

Network trust

what's this?
RPKI hygiene: B how networks compare →
94.3% of checked blocks have valid RPKI ROA coverage (82 of 87)
Possible discrepancies (7)

These blocks are registered to CEZNET s.r.o. but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a01:a040::/40 /40 authorized for AS39791 — Telco Pro Services, a. s.
2a01:a040:100::/40 /40 authorized for AS39791 — Telco Pro Services, a. s.
2a01:a040:200e::/48 /48 authorized for AS39791 — Telco Pro Services, a. s.
2a01:a040:2010::/48 /48 authorized for AS39791 — Telco Pro Services, a. s.
89.111.114.0/23 /23 authorized for AS39791 — Telco Pro Services, a. s.
89.111.116.0/23 /23 authorized for AS39791 — Telco Pro Services, a. s.
89.111.118.0/24 /24 authorized for AS39791 — Telco Pro Services, a. s.

NIC Handles

AS198002 AS201654 AS204064 AS25424 AS47493 AS49101 AS57728 AS6740 CEZNET-MNT CEZNET-MNT CEZNETAS-MNT CH13482-RIPE +14 more