ASN Lookup

Find the autonomous system behind an IP address or inspect an ASN, its operator and announced network prefixes.

Routing data comes from RIPEstat. Up to 50 announced prefixes are shown; coverage can be incomplete.

IP Geolocation by DB-IP · CC BY 4.0

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How to use this tool

  1. Enter an ASN such as AS13335, or a public IPv4 or IPv6 address.
  2. Select Look up and review the available results.
  3. Check the data source and date before relying on a result.

Understanding the results

An ASN identifies an autonomous network. Announced prefixes describe routing observations, not a complete list of the operator’s customers or physical locations.

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