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2. nslookup - Wikipedia

   en.wikipedia.org/wiki/Nslookup

   nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).

3. WHOIS - Wikipedia

   en.wikipedia.org/wiki/WHOIS

   Lookups of IP address allocations are often limited to the larger Classless Inter-Domain Routing (CIDR) blocks (e.g., /24, /22, /16), because usually only the regional Internet registries (RIRs) and domain registrars run RWhois or WHOIS servers, although RWhois is intended to be run by even smaller local Internet registries, to provide more ...

4. Namecheap - Wikipedia

   en.wikipedia.org/wiki/Namecheap

   Namecheap is an American ICANN-accredited domain name registrar [1] and web hosting company, based in Phoenix, Arizona. The company was founded in 2000 by Richard Kirkendall [2] and has since grown to become one of the largest independent domain registrars in the world, with over 10 million customers and over 17 million domains under management.

5. Reverse DNS lookup - Wikipedia

   en.wikipedia.org/wiki/Reverse_DNS_lookup

   For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google. If the A record for dns.google in turn pointed back to 8.8.4.4 then it would be said to be forward-confirmed.

6. Network Solutions - Wikipedia

   en.wikipedia.org/wiki/Network_Solutions

   Network Solutions, LLC, formerly Web.com, is an American-based technology company and a subsidiary of Web.com, the 4th-largest .com domain name registrar, with over 6.7 million registrations as of August 2018. [1]

7. Registration Data Access Protocol - Wikipedia

   en.wikipedia.org/wiki/Registration_Data_Access...

   It is a successor to the WHOIS protocol, used to look up relevant registration data from such Internet resources as domain names, IP addresses, and autonomous system numbers. While WHOIS essentially retrieves free text, RDAP delivers data in a standard, machine-readable JSON format. [1]

8. Wildcard DNS record - Wikipedia

   en.wikipedia.org/wiki/Wildcard_DNS_record

   A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a * as the leftmost label (part) of a domain name, e.g. *.example.com. The exact rules for when a wildcard will match are specified in RFC 1034, but the rules are neither intuitive nor clearly ...

9. Internet Assigned Numbers Authority - Wikipedia

   en.wikipedia.org/wiki/Internet_Assigned_Numbers...

   The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Internet Protocol–related symbols and Internet numbers. [1] [2]