- Whois Source
 - Domain name research tool that allows wild card searches. - Whois.Net
- Searches both currently-owned and previously registered domains that are now available.
- Allwhois.com
- Listing of whois search engines for different countries. Allows you to check domain name availability in any country.
- DomainSearch.com
- Multiple lookup across a wide variety of domains.
- Namedroppers.com
- Search for sites and whois information based on domain names with com, net, org, and edu extentions.
- Network Solutions WHOIS Lookup
- Provides domain name ownership and administration information through domain, NIC handle, and IP address searches.
- easyWHOiS
- Obtain whois record for .com/.net/.org domains across registrars.
- JPNIC Whois Gateway
- Access Whois Domain Information
- Provides domain name ownership, registration, and expiry records for registrars.
- PCNames Domain Search
- Check domain name availability as you type for .com, .net, .org, .info, .biz, and .us extensions.
- FasterWhoIs.com
- Searches records of domain registrars for the administration and technical contact details.
- Biz Info Domain Name Whois
- Offers domain name search, ownership, and registration records for .biz and .info domains
- BetterWhois.com
- Meta search all domain registrars to find out who owns and administers a given Internet domain, and with what registrar the domain name is registered.
- Domain Wizard
- Free service offering search of whois and multi-whois.
- All the Whois
- Directory of whois search engines, software, lookups, and registries for different countries and domain name companies.
- Ajax Whois
- Instant whois and domain name search resource. Supports all domain extensions and foreign characters.
- Check Domains
- Resource that allows users to check for availability of domain names. Features IP address finder, domain name suggestion, and SEO tools.
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