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 |
|---|---|---|---|---|---|---|
| 5.134.121.0/24 | 256 |
5.9%
|
Fabio Mascio | IT | — | — |
| 5.134.123.0/24 | 256 |
30.1%
|
Fabio Mascio | IT | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS209583 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 |
|---|---|---|
| 5.134.123.0/24 | 10,198 | 2026-08-03 09:24:37 |
| 5.134.121.0/24 | 10,030 | 2026-08-03 09:24:37 |
Frequently Asked Questions
What is AS209583?
AS209583 is an Autonomous System Number assigned to Fabio Mascio. 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 AS209583 announce?
AS209583 announces 512 IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Italy.
Who operates AS209583?
AS209583 is operated by Fabio Mascio. The organization is based in Italy. You can view all IP ranges and related ASNs on the organization page.
What country is AS209583 registered in?
AS209583 is registered in Italy. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
