Here you can look up objects in WHOIS databases at: RIPE , ARIN , LACNIC , APNIC and InterNIC . If the registration authority is not known use a whois client that can intelligently pick a registration authroity for you.
Search other WHOIS Databases
RIPE (Reseaux IP Europeens):
Link to web search form https://apps.db.ripe.net/db-web-ui/#/query
Command to run in a shell:
Link to web search form https://apps.db.ripe.net/db-web-ui/#/query
Command to run in a shell:
whois -h whois.ripe.net terminal_query
ARIN (American Registry of Internet Numbers):
Link to web search form https://whois.arin.net/ui/advanced.jsp
Command to run in a shell:
Link to web search form https://whois.arin.net/ui/advanced.jsp
Command to run in a shell:
whois -h whois.arin.net terminal_query
AfriNIC (African Network Information Center):
Link to web search form https://afrinic.net/whois
Command to run in a shell:
Link to web search form https://afrinic.net/whois
Command to run in a shell:
whois -h whois.afrinic.net terminal_query
APNIC (Asia Pacific Network Information Center):
Link to web search form https://wq.apnic.net/static/search.html
Command to run in a shell:
Link to web search form https://wq.apnic.net/static/search.html
Command to run in a shell:
whois -h whois.apnic.net terminal_query
LACNIC (Latin American and Carribbean Network Information Center):
Link to web search form https://rdap-web.lacnic.net/whois
Command to run in a shell:
Link to web search form https://rdap-web.lacnic.net/whois
Command to run in a shell:
whois -h whois.lacnic.net terminal_query
InterNIC:
Link to web search form https://www.internic.net/whois.html
Command to run in a shell:
Link to web search form https://www.internic.net/whois.html
Command to run in a shell:
whois -h whois.internic.net terminal_query
Generic search:
Command to run in a shell:
Command to run in a shell:
whois terminal_query