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ICANN Lookup review

Free#12 of 27 in WHOIS Lookup Tools

A focused, free lookup tool for current domain, IP network, and ASN registration data.

7.6/10Editor score
Visit ICANN Lookup
ICANN Lookup7.6 Visit ICANN Lookup

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

ICANN Lookup is a free, web-based registration data lookup tool operated by ICANN. It is designed for individual, professional, and organizational users who need current registration information for domain names, IP networks, ASNs, and other Internet number resources. Results are presented in a human-readable format, making the tool suitable for checking registration records without a paid plan or separate desktop application.

The lookup process uses RDAP-based queries and displays current data supplied by registries and registrars. When RDAP data is unavailable for a domain, ICANN Lookup may use the relevant registry operator’s WHOIS service instead. This gives the tool a focused role in current registration research across domains and Internet number resources, while real-time registry and registrar results help keep the displayed information tied to current records.

ICANN Lookup is a strong fit for users who need free, current lookups through a browser, including domain registration checks and IP network or ASN research. Its scope is narrower for teams that need automation or historical analysis: the published specifications show no public lookup API, bulk lookup, historical WHOIS access, or export formats. It also does not provide paid tiers or AI features. Choose it for straightforward, current registration data and nonpublic-data request routing through RDRS; choose another tool when recurring automated queries, bulk processing, or historical records are central requirements.

ICANN Lookup pros and cons

  • Where it wins
    • Covers domains, IP networks, and ASNs in one web tool
    • Uses RDAP with WHOIS fallback when RDAP data is unavailable
    • Routes nonpublic-data requests through RDRS
  • Where it doesn't
    • No public lookup API access
    • No bulk lookup capability
    • No historical WHOIS access

ICANN Lookup fact sheet, pricing and score →

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