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Whois Domain Name and IP Address Lookup

FAQ (Frequently Asked Questions)

What is whois?

Whois is a query and response protocol used to find information on domain names, IP Addresses, domain hosts and networks. Domain Name Registration is regulated by the Internet Corporation for Assigned Names and Numbers (ICANN) and requires accredited registrars to provide free access to information on registered domain names, registrars, domain creation and expiration dates. You can find all this information and more about domains and IP Addresses from Whois.web.id.

What is a domain name?

Based on Wikipedia, the definition of domain name is an identification string that defines a realm of administrative autonomy, authority, or control in the Internet. Domain names are formed by the rules and procedures of the Domain Name System (DNS).

Domain names are used in various networking contexts and application-specific naming and addressing purposes. A domain name generally represents an Internet Protocol (IP) resource, such as a personal computer (PC) used to access the Internet, a server computer hosting a website, or the website itself or any other service communicated via the Internet.

What is a Top-level domain?

The definition of a top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet. For all domains in lower levels, it is the last part of the domain name, that is, the last label of a fully qualified domain name. For example, in the domain name www.myexample.com, the top-level domain is .com (or .COM, as domain names are not case-sensitive). Management of most top-level domains is delegated to responsible organizations by the Internet Corporation for Assigned Names and Numbers (ICANN), which operates the Internet Assigned Numbers Authority (IANA) and is in charge of maintaining the DNS root zone. IANA today distinguishes the following groups of top-level domains:

What is a Country code top-level domain?

The definition of A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, a sovereign state, or a dependent territory.

What is Internationalized country code top-level domain?

The definition of An internationalized country code top-level domain (IDN ccTLD or ccIDN) is a top-level domain (TLD) in the Domain Name System (DNS) of the Internet. IDN ccTLDs are specially encoded domain names that are displayed in an end user application, such as a web browser, in their language-native script or alphabet, such as the Arabic alphabet, or a non-alphabetic writing system, such as Chinese characters. IDN ccTLDs are an application of the internationalized domain name system to top-level Internet domains assigned to countries, or independent geographic regions. Although the domain class uses the term code, some of these ccTLDs are not codes but full words. For example, السعودية (as-Suʻūdiyya) is not an abbreviation of "Saudi Arabia", but the common name of the country in Arabic.

What is a Generic top-level domain?

The definition of A generic top-level domain (gTLD) is one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. The core group of generic top-level domains consists of the com, info, net, and org domains. In addition, the domains biz, name, and pro are also considered generic; however, these are designated as restricted, because registrations within them require proof of eligibility within the guidelines set for each.

What is an Infrastructure domain?

The domain arpa was the first Internet top-level domain that was intended to be used only temporarily, aiding in the transition of traditional ARPANET host names to the domain name system. However, after it had been used for reverse DNS lookup, it was found impractical to retire it, and is used today exclusively for Internet infrastructure purposes such as in-addr.arpa for IPv4 and ip6.arpa for IPv6 reverse DNS resolution, uri.arpa and urn.arpa for the Dynamic Delegation Discovery System, and e164.arpa for telephone number mapping based on NAPTR DNS records. For historical reasons, arpa is sometimes considered to be a generic top-level domain.

What is the definition Reserved domains?

Reserved domains are domains that cannot be used because RFC 2606 reserves the following four top-level domain names to avoid confusion and conflict.

  1. example: reserved for use in examples
  2. invalid: reserved for use in obviously invalid domain names
  3. localhost: reserved to avoid conflict with the traditional use of localhost as a hostname
  4. test: reserved for use in tests

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