Overview

Top-level domains often abbreviated as TLDs are the domains at the highest level in the hierarchical DNS( Domain Name System) after the root domain. A DNS zone is an administrative space of the DNS namespace allowing more granular control of the DNS components.

 

Top-Level Domains

There are basically two types of top-level domains:

• Non-geographical domains
• Geographical domains

Non-geographical domains

Non-geographical domains or those which indicate the type of organization, e.g., in www.yahoo.com, the .com indicates that it is a commercial organization.

The Standard Non-Geographical Domains (Top Domains) are:

Domain		Example
.com	The .com domain is for commercial organizations	www.google.com
.edu	The .edu domain is for higher educational institutions like universities.	www.harvard.edu
.gov	The .gov domain is for government organizations.	www.usa.gov
.mil	The .mil domain is for the US military organizations	www.army.mil
.net	The .net domain is for network organizations or resources	www.juniper.net
.org	The .org website is for non-profit organizations which are not educational or commercial.	www.wikipedia.org

Geographical domains

Geographical domains indicate the code for individual countries. The geographically based top-level domains use two-letter country designations.

Examples of some geographic domains:

Domain	Description
af	Afghanistan
bb	Barbados
in	India
kr	Korea (Republic of)
kw	Kuwait (State of)