best whois - SERP Analysis

https://www.reddit.com/r/sysadmin/comments/2ejw03/best_whois_site/

https://lookup.icann.org/

https://www.whois.com/whois/

https://www.eurodns.com/whois-search/best-domain-name

https://whois.domaintools.com/

https://thedomainrobot.com/blog/whois-domain-lookup-tools/

https://www.godaddy.com/whois

https://mxtoolbox.com/whois.aspx

https://webmasters.stackexchange.com/questions/287/where-can-i-safetly-search-domain-whois-without-worrying-about-the-search-engine

https://www.namecheap.com/domains/whois/