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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 185.101.28.0/23 | 512 |
0.0%
|
Atlantic Systemes Sarl | FR | — | — |
| 185.101.30.0/24 | 256 |
1.6%
|
Atlantic Systemes Sarl | FR | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS203901 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 |
|---|---|---|
| 185.101.30.0/24 | 4,929 | 2026-08-05 14:42:13 |
Frequently Asked Questions
What is AS203901?
AS203901 is an Autonomous System Number assigned to Atlantic Systemes Sarl. 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 AS203901 announce?
AS203901 announces 768 IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in France.
Who operates AS203901?
AS203901 is operated by Atlantic Systemes Sarl. The organization is based in France. You can view all IP ranges and related ASNs on the organization page.
What country is AS203901 registered in?
AS203901 is registered in France. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
