jetsung 域名 whois 查询工具和网站 Websites WHOIS: https://www.iana.org/whois https://lookup.icann.org https://who.is https://whois-search.com https://dnslytics.com/whois-lookup https://dnsape.com/whois/ http://www.55hl.com/whois.asp https://dnstools.ws （需验证码） 第三方 Whois https://who.cx/ https://who.cx/idev.top DNS https://digwebinterface.com/ Commandline tools WHOIS: jwhois or whois DNS: dig or nslookup
jetsung (whois.iana.org) -> registry (e.g. whois.verisign-grs.com) -> registrar (e.g. whois.markmonitor.com)