AS201021
Onur Bilisim Ve Yazilim Hizmetleri
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
- Multiple-origin (MOAS) routing anomaly −12
- Trust score 53 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 4 MOAS prefixes — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS201021 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 185.103.196.0/24 | AS48678, AS65003, AS201021 | 2026-07-18 09:07:43 |
| 185.28.61.0/24 | AS48678, AS65003, AS201021 | 2026-07-18 02:52:40 |
| 185.106.21.0/24 | AS48678, AS65003, AS201021 | 2026-07-17 19:22:38 |
| 193.124.200.0/24 | AS48678, AS65003, AS201021 | 2026-07-17 07:22:33 |
Top CIDR ranges
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS201021 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 |
|---|---|---|
| 185.106.21.0/24 | 78,286 | 2026-07-18 10:54:34 |
| 185.28.61.0/24 | 72,206 | 2026-07-18 10:54:34 |
| 185.103.196.0/24 | 63,968 | 2026-07-18 10:54:34 |
| 185.106.22.0/24 | 62,501 | 2026-07-18 10:54:34 |
| 185.103.199.0/24 | 60,757 | 2026-07-18 10:52:57 |
| 185.28.60.0/24 | 60,583 | 2026-07-18 10:54:34 |
| 185.106.23.0/24 | 60,430 | 2026-07-18 10:54:34 |
| 185.106.20.0/24 | 53,565 | 2026-07-18 10:54:34 |
| 185.28.63.0/24 | 53,403 | 2026-07-18 10:52:57 |
| 89.39.125.0/24 | 53,068 | 2026-07-18 11:05:21 |
| 212.16.85.0/24 | 52,864 | 2026-07-18 11:05:52 |
| 212.193.13.0/24 | 52,824 | 2026-07-18 11:05:52 |
| 193.124.200.0/24 | 52,617 | 2026-07-18 10:52:57 |
| 93.90.75.0/24 | 52,339 | 2026-07-18 10:52:57 |
| 185.143.75.0/24 | 52,002 | 2026-07-18 10:52:57 |
| 194.87.170.0/24 | 51,960 | 2026-07-18 10:52:57 |
| 194.87.67.0/24 | 51,936 | 2026-07-18 10:52:57 |
| 194.135.18.0/24 | 51,929 | 2026-07-18 10:52:57 |
| 188.241.137.0/24 | 51,880 | 2026-07-18 10:52:57 |
| 194.87.172.0/24 | 51,799 | 2026-07-18 10:52:57 |
| 89.45.162.0/24 | 51,578 | 2026-07-18 11:05:21 |
| 77.81.88.0/24 | 51,546 | 2026-07-18 10:52:57 |
| 185.103.197.0/24 | 51,465 | 2026-07-18 10:54:34 |
| 212.192.5.0/24 | 51,368 | 2026-07-18 11:05:52 |
| 194.135.32.0/24 | 51,299 | 2026-07-18 10:52:57 |
| 212.192.244.0/24 | 51,282 | 2026-07-18 11:05:52 |
| 193.124.202.0/24 | 51,278 | 2026-07-18 10:52:57 |
| 194.87.81.0/24 | 51,244 | 2026-07-18 10:52:57 |
| 185.143.74.0/24 | 51,242 | 2026-07-18 10:52:57 |
| 193.124.95.0/24 | 51,239 | 2026-07-18 10:52:57 |
| 212.193.12.0/24 | 51,237 | 2026-07-18 11:05:52 |
| 185.84.183.0/24 | 51,212 | 2026-07-18 10:52:57 |
| 194.87.149.0/24 | 51,204 | 2026-07-18 10:52:57 |
| 194.87.66.0/24 | 51,203 | 2026-07-18 10:52:57 |
| 195.58.60.0/24 | 51,194 | 2026-07-18 11:06:16 |
| 185.103.198.0/24 | 50,972 | 2026-07-18 10:54:34 |
| 89.37.194.0/24 | 50,936 | 2026-07-18 11:05:21 |
| 86.107.51.0/24 | 50,936 | 2026-07-18 10:52:57 |
| 89.43.62.0/24 | 50,876 | 2026-07-18 11:05:21 |
| 77.81.100.0/24 | 50,843 | 2026-07-18 10:52:57 |
| 93.115.105.0/24 | 50,824 | 2026-07-18 10:52:57 |
| 62.76.224.0/24 | 50,336 | 2026-07-18 10:52:57 |
| 46.38.141.0/24 | 49,084 | 2026-07-18 10:52:57 |
| 5.144.183.0/24 | 31,161 | 2026-07-18 10:52:57 |
| 185.28.62.0/24 | 14,562 | 2026-07-18 10:51:58 |
| 178.83.111.0/24 | 6,246 | 2026-07-18 11:44:13 |
| 167.148.215.0/24 | 2,913 | 2026-07-18 11:35:30 |
| 178.239.112.0/24 | 2,907 | 2026-07-18 11:37:00 |
| 31.77.247.0/24 | 2,695 | 2026-07-18 11:22:15 |
| 96.62.115.0/24 | 2,671 | 2026-07-18 11:35:30 |
Showing top 50 of 52 announced prefixes by sample volume.
Frequently Asked Questions
What is AS201021?
AS201021 is an Autonomous System Number assigned to Onur Bilisim Ve Yazilim Hizmetleri. 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 AS201021 announce?
AS201021 announces 11.8K IPv4 addresses distributed across 40 routed CIDR prefixes. The network is registered in Czechia.
Who operates AS201021?
AS201021 is operated by Onur Bilisim Ve Yazilim Hizmetleri. The organization is based in Czechia. You can view all IP ranges and related ASNs on the organization page.
What country is AS201021 registered in?
AS201021 is registered in Czechia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
