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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About Nej.cz
Company in the Czech Republic.
Network profile
Source: PeeringDB →Present at 1 internet exchange: BR-IX: PEER
AS12570 — global IP footprint
Cities where AS12570 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS12570 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 |
|---|---|---|
| 89.190.48.0/20 | 5,187 | 2026-07-21 20:31:14 |
| 89.190.40.0/21 | 5,171 | 2026-07-21 20:31:14 |
| 213.211.32.0/19 | 5,119 | 2026-07-21 20:31:14 |
| 88.83.224.0/19 | 4,479 | 2026-07-21 20:17:21 |
| 80.78.144.0/20 | 4,433 | 2026-07-21 20:17:21 |
| 185.8.188.0/22 | 4,406 | 2026-07-21 20:24:09 |
| 212.4.128.0/19 | 4,399 | 2026-07-21 20:24:09 |
| 109.105.32.0/19 | 4,383 | 2026-07-21 20:24:09 |
| 193.17.248.0/22 | 4,345 | 2026-07-21 20:24:09 |
| 195.78.122.0/23 | 4,340 | 2026-07-21 20:24:09 |
| 212.96.160.0/19 | 4,323 | 2026-07-21 20:24:09 |
Frequently Asked Questions
What is AS12570?
AS12570 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 AS12570 announce?
AS12570 announces 50.2K IPv4 addresses distributed across 31 routed CIDR prefixes. The network is registered in Czechia.
Who operates AS12570?
AS12570 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 AS12570 registered in?
AS12570 is registered in Czechia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
