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ASN lookup

Enter an Autonomous System Number — AS15169 or just 15169 — to see who runs the network: the org name, country, the registry that issued it, and when it was registered. Pulled live from RDAP.

What an ASN tells you

FAQ

What is an ASN lookup?
An ASN (Autonomous System Number) identifies a network operator. This tool takes an ASN and returns the network name, organization, country, the registry (RIR) that issued it and its registration dates, pulled live from RDAP.

How do I enter an ASN?
Type it with or without the AS prefix — both AS15169 and 15169 work.

What does the registry (RIR) field mean?
It shows which regional internet registry issued the ASN: ARIN (North America), RIPE NCC (Europe), APNIC (Asia-Pacific), LACNIC (Latin America) or AFRINIC (Africa).

Is this free and private?
Yes. It's free with no sign-up and runs in your browser; nothing you enter is stored.

You found who owns the network. Now find what's wrong with yours.

An ASN names the operator behind an IP — useful, but it won't tell you why your own connection is slow. Acutis Go runs a 60-second check and says whether it's the network or your machine. Free.

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Related guide: What is an ASN?