Domain Name System List

Iana also oversees the approval process for new proposed top level domains for icann.

Domain name system list. A dnsbl is a software mechanism rather than a specific list or policy. There are several domain names available. A domain name system based list dnsbl is an anti spam technique used to track ip addresses that send spam.

While there are over 1 500 gtlds in use these 21 make up the vast majority of all types of domain names. A list of the top level domains by the internet assigned numbers authority is maintained at the root zone database. As of now there are currently 21 generic top level domains within the root zone which is the highest level of the domain name system structure.

Some of them are generic such as com edu gov net etc while some country level domain names such as au in za us etc. It associates various information with domain names assigned to each of the participating entities. In simple terms a domain name system dns is a collection of databases that translate hostnames to ip addresses.

The following table shows the generic top level domain names. There are dozens of. Dnsbl is a database of ip addresses that includes the addresses of known spammers open relays proxy servers and computers compromised by crackers and malicious code also known as zombie computers.

As of june 2020 their root domain contains 1511 top level domains with a number of tlds that have been retired and are no longer functional. Generic top level domains function as a category of top level domains within the dns. The domain name system dns is a hierarchical and decentralized naming system for computers services or other resources connected to the internet or a private network.

Domain name is a symbolic string associated with an ip address. Most mail server software can be configured to check one or more of such lists typically rejecting or flagging messages if it is from a listed site.