Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Enterprise allocation +4
- Trust score 69 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Nej.cz
Company in the Czech Republic.
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 83.240.0.0/17 | 32.8K |
16.9%
|
O2 Czech Republic, a.s. | CZ | Pardubice Region | Vražné |
| 95.82.128.0/18 | 16.4K |
17.9%
|
O2 Czech Republic, a.s. | CZ | South Moravian | Brno |
| 46.39.160.0/19 | 8.2K |
17.5%
|
O2 Czech Republic, a.s. | CZ | South Moravian | Brno |
| 213.155.224.0/19 | 8.2K |
0.0%
|
O2 Czech Republic, a.s. | CZ | Moravian-Silesian Region | Opava |
| 185.51.240.0/22 | 1.0K |
13.0%
|
O2 Czech Republic, a.s. | CZ | South Moravian | Předklášteří |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS31246 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 213.155.224.0/19 | 7,258 | 2026-07-24 15:25:36 |
| 46.39.160.0/19 | 4,801 | 2026-07-24 15:25:46 |
| 83.240.0.0/17 | 4,796 | 2026-07-24 15:25:46 |
| 185.51.240.0/22 | 4,700 | 2026-07-24 15:25:46 |
| 95.82.128.0/18 | 4,694 | 2026-07-24 15:25:46 |
Frequently Asked Questions
What is AS31246?
AS31246 is an Autonomous System Number assigned to O2 Czech Republic, a.s.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS31246 announce?
AS31246 announces 66.6K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in Czechia.
Who operates AS31246?
AS31246 is operated by O2 Czech Republic, a.s.. The organization is based in Czechia. You can view all IP ranges and related ASNs on the organization page.
What country is AS31246 registered in?
AS31246 is registered in Czechia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
