Ads
related to: domain name checking list for free address registration lookup search
Search results
Results From The WOW.Com Content Network
This is a list of the oldest extant registered generic top-level domains used in the Domain Name System of the Internet. Until late February 1986, Domain Registration was limited to organizations with access to ARPA. Public registration was revealed on Usenet on February 24, 1986. [1]
This domain is therefore almost exclusively used by American colleges and universities. Some institutions, such as the Exploratorium, that do not meet the current registration criteria have grandfathered domain names. No: Yes: Yes: Yes .gov: U.S. national and state government agencies: Cybersecurity and Infrastructure Security Agency (via Verisign)
A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist ( DNSBL) or real-time blackhole list ( RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [ 1]
A reverse DNS lookup is a query of the DNS for domain names when the IP address is known. Multiple domain names may be associated with an IP address. The DNS stores IP addresses in the form of domain names as specially formatted names in pointer (PTR) records within the infrastructure top-level domain arpa. For IPv4, the domain is in-addr.arpa.
A country code top-level domain ( ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ccTLD identifiers are two letters long, and all two-letter top-level domains are ccTLDs.
The initial set of generic top-level domains, defined by RFC 920 in October 1984, was a set of "general purpose domains": com, edu, gov, mil, org. The net domain was added with the first implementation of these domains. The com, net, and org TLDs, despite their originally specified goals, are now open to use for any purpose.
Ads
related to: domain name checking list for free address registration lookup search