IPLense

WHOIS and Network Ranges

Look up the registrant, range hierarchy and abuse contact of an IP, range or ASN.

WHOIS and Network Ranges

Looking up…

Looking up…

How the WHOIS lookup works

  1. Find the registry at IANA

    The data comes from IANA, the regional registries’ (RIR) RDAP and RIPEstat, all queried by your browser directly. It first reads IANA’s RDAP bootstrap files and finds the RIR responsible for the block or ASN range.

  2. Ask the RIR for the registration

    It then asks that RIR’s RDAP directly; APNIC and LACNIC hand some objects to a national registry. The page reads only the organization, an organizational abuse mailbox, the ranges and the dates.

  3. Compare with global routing

    RIPEstat gives the prefix announced for the address in global routing and the ASN announcing it; for an ASN, the number of prefixes it announces.

Reading the levels

  • IANA → RIRThe block IANA delegated to the RIR.
  • AnnouncedDashed: the prefix announced in global routing, from RIPEstat, not the RIR’s registration.
  • RegisteredFilled pill: the range the RIR registered to the organization, the one the bar shows.

Frequently asked questions

Why are contact names and phone numbers not shown?

RIR records can include a person’s name, phone and address. This page shows only the organization and an organizational abuse mailbox; for the full record, follow the link to the RIR’s official RDAP below the details.

How is a registered range different from an announced prefix?

The registered range is who the RIR records the addresses to; the announced prefix is how, and by which ASN, they are actually routed. They can differ, for example when a network holds a large range and assigns part of it to a customer.

Can I look up a domain’s WHOIS?

No. This page looks up IP, range and ASN registrations only.

Related tools: Global Ping and MTRIP Lookup

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