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) |