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 →Present at 1 internet exchange: NIX.CZ: Public peering VLAN
AS5610 — global IP footprint
Cities where AS5610 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 AS5610 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 |
|---|---|---|
| 80.188.222.0/24 | 19,243 | 2026-09-09 22:54:16 |
| 83.208.220.0/22 | 19,095 | 2026-09-09 22:54:16 |
| 80.188.128.0/17 | 19,026 | 2026-09-09 22:54:16 |
| 81.90.168.0/21 | 19,018 | 2026-09-09 22:54:16 |
| 85.71.224.0/19 | 18,994 | 2026-09-09 22:54:16 |
| 88.83.175.0/24 | 18,990 | 2026-09-09 22:54:31 |
| 90.181.0.0/16 | 18,980 | 2026-09-09 22:54:31 |
| 90.182.0.0/16 | 18,971 | 2026-09-09 22:54:31 |
| 90.183.0.0/16 | 18,969 | 2026-09-09 22:54:31 |
| 80.188.0.0/17 | 18,946 | 2026-09-09 22:54:16 |
| 90.176.170.0/24 | 18,868 | 2026-09-09 22:54:31 |
| 194.228.0.0/17 | 16,700 | 2026-09-09 22:58:14 |
| 194.228.128.0/17 | 16,675 | 2026-09-09 22:58:14 |
| 194.50.248.0/23 | 16,225 | 2026-09-09 23:34:08 |
| 88.100.0.0/15 | 14,029 | 2026-09-09 23:33:38 |
| 91.193.132.0/22 | 13,342 | 2026-09-09 22:38:08 |
| 85.70.0.0/15 | 13,247 | 2026-09-09 23:33:38 |
| 109.81.160.0/20 | 13,216 | 2026-09-09 23:33:38 |
| 109.81.112.0/20 | 13,210 | 2026-09-09 23:33:38 |
| 85.70.0.0/16 | 13,188 | 2026-09-09 23:33:38 |
| 85.193.0.0/18 | 13,139 | 2026-09-09 23:33:38 |
| 193.84.12.0/23 | 11,682 | 2026-09-09 22:38:08 |
| 193.84.14.0/23 | 11,668 | 2026-09-09 22:38:08 |
| 5.23.39.0/24 | 9,145 | 2026-09-09 22:34:31 |
| 37.188.128.0/17 | 8,890 | 2026-09-09 22:38:08 |
| 80.188.40.0/24 | 8,887 | 2026-09-09 22:38:08 |
| 85.70.0.0/17 | 8,879 | 2026-09-09 22:38:08 |
| 83.208.64.0/18 | 8,877 | 2026-09-09 22:38:08 |
| 90.176.128.0/17 | 8,873 | 2026-09-09 22:38:08 |
| 83.208.0.0/16 | 8,866 | 2026-09-09 22:38:08 |
| 85.71.0.0/16 | 8,862 | 2026-09-09 22:38:08 |
| 88.102.0.0/16 | 8,859 | 2026-09-09 22:38:08 |
| 85.70.128.0/17 | 8,854 | 2026-09-09 22:38:08 |
| 92.243.192.0/19 | 8,854 | 2026-09-09 22:38:08 |
| 83.208.128.0/19 | 8,853 | 2026-09-09 22:38:08 |
| 81.90.160.0/20 | 8,852 | 2026-09-09 22:38:08 |
| 83.69.32.0/19 | 8,851 | 2026-09-09 22:38:08 |
| 91.191.64.0/18 | 8,850 | 2026-09-09 22:38:08 |
| 90.180.0.0/14 | 8,849 | 2026-09-09 22:38:08 |
| 88.100.0.0/14 | 8,846 | 2026-09-09 22:38:08 |
| 88.83.160.0/19 | 8,845 | 2026-09-09 22:38:08 |
| 90.176.64.0/18 | 8,845 | 2026-09-09 22:38:08 |
| 90.177.0.0/16 | 8,844 | 2026-09-09 22:38:08 |
| 90.178.0.0/15 | 8,842 | 2026-09-09 22:38:08 |
| 109.80.0.0/15 | 8,829 | 2026-09-09 22:38:08 |
| 90.182.108.0/24 | 8,824 | 2026-09-09 22:38:08 |
| 80.188.0.0/16 | 8,821 | 2026-09-09 22:38:08 |
| 83.208.0.0/18 | 8,812 | 2026-09-09 22:38:08 |
| 81.90.173.0/24 | 8,799 | 2026-09-09 22:38:08 |
| 91.232.82.0/24 | 8,794 | 2026-09-09 22:38:08 |
Showing top 50 of 67 announced prefixes by sample volume.
Frequently Asked Questions
What is AS5610?
AS5610 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 AS5610 announce?
AS5610 announces 1.54M IPv4 addresses distributed across 47 routed CIDR prefixes. The network is registered in Czechia.
Who operates AS5610?
AS5610 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 AS5610 registered in?
AS5610 is registered in Czechia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
