O2 Czech Republic a.s.
O2 Czech Republic, a.s.
GLEIF verified
Complete entity footprint
3 linked clusters ·
3,602 netblocks ·
6,146,089 IPv4 addresses
This organisation's clusters combined by evidence —
shared GLEIF corporate family
and
shared operating domain o2.cz
— not name similarity, so genuinely different organisations that share a name are excluded.
LEI
3157004ICDH3MRKW7534
Registered name
O2 Czech Republic a.s.
Jurisdiction
Ultimate parent
AMALAR HOLDING s.r.o.
984500CE58365CB10V25
Cluster stats
| Netblocks | 293 · 4,862,477 IPv4 addresses |
| Registered in | Czechia (241) · France (1) · Italy (1) · Slovakia (1) · United States (1) |
| Cluster ID | 208786204 |
| Registry | BGP |
| Owner jurisdiction | CZ |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 3157004ICDH3MRKW7534 |
| Shared handles | clustered on 35 shared RIR contact/maintainer handles |
| Registry names | 3 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
293
0 netblocks since 2026-07-05
2026-07-05
peak 293
2026-07-19
IP Ranges (293)
showing 50 of 293 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 5.23.39.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 5.102.48.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 31.10.56.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 37.188.128.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 45.159.116.0/22 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 46.39.160.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 46.183.56.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 46.231.72.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 77.87.232.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 77.95.192.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 77.242.80.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 78.41.8.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 78.108.152.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 78.136.128.0/18 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.78.136.0/22 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.78.144.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.79.0.0/22 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.87.176.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.90.128.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.188.0.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.188.0.0/16 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.188.40.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.188.128.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.188.222.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.243.96.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.243.236.0/22 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 80.251.240.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.90.160.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.90.168.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.90.168.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.90.170.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.90.173.0/24 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.200.48.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.200.48.0/20 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 81.200.56.0/21 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 82.114.192.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 82.150.160.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.69.32.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.208.0.0/18 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.208.0.0/16 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.208.64.0/18 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.208.128.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.208.220.0/22 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 83.240.0.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.70.0.0/16 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.70.0.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.70.0.0/15 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.70.128.0/17 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.71.0.0/16 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
| 85.71.224.0/19 | O2 Czech Republic, a.s. | BGP | ANNOUNCED | ● high |
Domains hosted in this network
what's this?Customer-delegated space
how is this classified?Corporate group (2 confirmed entities)
+2,665 additional unconfirmed candidates not shown — full list (JSON)- CETIN a.s. 54 blocks
Network trust
what's this?
RPKI hygiene: A
how networks compare →
95.2%
of checked blocks have valid RPKI ROA coverage
(279 of 293)
No discrepancies found among checked blocks.
NIC Handles
AS12570
AS12767-MNT
AS16246
AS29321
AS31246
AS41046
AS42908
AS44070
AS47681
AS49767
AS5610
AS5610
+23 more