What is a TLD, and what are its types and uses?

TLD stands for top-level domain and refers to the final part of a domain name, such as .com in www.semrush.com. The supplied 2021 Semrush article introduces TLDs through generic, sponsored, and country-code categories: some names correspond to uses such as commerce or organizations, while others relate to specific fields or countries. However, a description of intended use is not the same as registration eligibility. A TLD’s resemblance to a file extension is not a basis for assuming that anyone can register it.

A TLD is part of a domain, not the entire website name

In www.semrush.com, for example, the TLD is .com, not the entire name. The key to identifying a TLD is its position at the end of the domain; similar names before it do not mean that different endings point to the same website.

The original article explains that using yourdomain.com does not mean the website can also be accessed through yourdomain.ca or yourdomain.org. These are different domains and cannot be treated as interchangeable addresses simply because their first parts are identical.

Three introductory categories: generic, sponsored, and country-code

The original article introduces three types of TLDs. The following retains some of its clearer examples as an introductory guide, rather than a complete classification or set of registration rules:

• Generic top-level domains (gTLDs): Examples in the original article include .com, .net, and .org, which illustrate names associated with commercial, network, and organizational uses.
• Sponsored top-level domains (sTLDs): The original article lists .museum and .travel, but the supplied excerpt does not further explain how sponsorship works or the registration requirements for either.
• Country-code top-level domains (ccTLDs): These are based on country codes. The original article gives .ca, .uk, .ae, and .fr as examples.

Names can suggest intended uses, but they cannot replace eligibility checks

The usage table in this 2021 article associates .com with commerce, .org with organizations, and .net with networks. It also lists .int for international use, .edu for education, .gov for U.S. government agencies, and .mil for U.S. military use.

This comparison helps explain the uses suggested by these names, but it is not enough to answer the question, “Can I register one for my website?” For example, describing .edu as intended for education does not mean that every education-related website qualifies for registration; the material does not provide the eligibility rules needed to make that determination.

When making an initial comparison of TLDs, it therefore helps to distinguish whether your focus is on a name’s intended use, a country code, or a specific domain address. These address different questions, and the usage table in this historical article alone cannot establish which registrations are currently open to whom.