ASN Data

ASN lookup

ASN Lookup: Find the Network Behind Any IP

Look up the autonomous system number for an IP, plus the owning organization, network type and the ranges it announces.

Key Features

Full ASN records

The Autonomous System Number, the owning organization, and the ranges it announces.

Hosting or home

See whether an IP belongs to a residential ISP, a hosting company, or a cloud platform.

Spot risky networks

Some ASNs are known for spam and abuse. We tell you when an IP sits in one.

Explore the suite

Try Our Other Tools

VPN DetectionIdentify IPs that route through encrypted VPN tunnels to mask their real location.Proxy DetectionFlag HTTP, SOCKS, residential and data-center proxies plus Tor exit nodes.IP GeolocationMap any IP to country, region and city with ISP and timezone data.WHOIS InfoRetrieve registration and ownership records for domains and IP ranges.

Frequently Asked Questions

ASN Data FAQ

An ASN is a globally unique number assigned to an autonomous system: a network or group of IP ranges run by one organization, such as an ISP, cloud provider, or enterprise. BGP uses ASNs to route traffic between networks across the internet.

Why Choose IPScanner

Teams use IPScanner to tell real users apart from masked and automated traffic.

Accuracy you can measure

Verdicts come with a 0 to 100 confidence score, so you tune the threshold to your own risk instead of trusting one number.

Built to scale

The API runs on infrastructure sized for production traffic, with a 99.9% uptime target for business-critical use.

Data that stays fresh

We refresh VPN, proxy, and Tor lists continuously, so newly spun-up servers get caught quickly.

Easy to wire in

A plain REST API works with any language or framework. Most teams are live the same afternoon.

Documentation that's honest

Worked examples in curl, JavaScript, and Python, plus straight notes on what each signal does and doesn't mean.

People who know the domain

Support comes from engineers who work on IP detection every day, not a generic help desk.