Company to IP, IP address owners, Reverse Whois + DNS, free tools & API

The free tools below allow to find IP addresses and domains owned by companies and organisations. Mass reverse DNS, reverse Whois, lists of registered domains.

SmartWhois · IP address owner lookup

Smart Whois - find out an owner / registrar of an IP address or IP address block. And country, state, city, network provider, etc.

WHOIS Lookup Domain & IP Address - Find The Owner With A Full ICANN Search

IPAddress.com's free WHOIS Lookup for a domain or IP Address will help you find the owner with a full search of the ICANN registrar's databases.

WhoisMind: Instant IP Address Lookup - Find People by IP

Lookup IP address details including location, owners, ISP, hostname, type, proxy, blacklist status and more. Find people information by IP.

What Is My DNS Server? Check Your DNS Server Address

Find the IP address, country and owner of the DNS server you’re using. Learn how to find your DNS server address as well as your router's DNS address.