whois

Online Tools

Name	Link
DomainTools	https://whois.domaintools.com/
ICANN	https://lookup.icann.org/en
NsLookup	https://www.nslookup.io/
VirusTotal	https://www.virustotal.com/gui/domain/google.com/details
Whois	https://www.whois.com/whois/
Whoxy	https://www.whoxy.com

Whoxy

https://www.whoxy.com https://www.whoxy.com/{domain_name} https://www.whoxy.com/{domain_name}#json https://www.whoxy.com/company/{int} https://www.whoxy.com/email/{int}

Tools

Ubuntu

whois

sudo apt install whois whois google.com