You can use rdaptastic to query IP RDAP data. This data includes:

• Events (Registration Date, Last update)
• Metadata (Country, Assignment)
• ASN (Anycast support, Description, City, Region, Country)
• Registrant
• IP contacts (Technical, Administrative, Abuse)

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IPv4 & IPv6 addresses are supported.

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You can use click-through queries to get more information about the ASN, by clicking on the ASN in the query result.