When you search for a domain name, you're not just choosing a name—you're also choosing an ending. That ending is your top-level domain, and it carries more meaning than most people realize.

This guide breaks down what TLDs are, how they're organized, what the most common extensions signal, and how to choose the one that fits your brand.

What Is a top-level domain?

A top-level domain (TLD) is the final segment of a domain name—the part that comes after the last dot. In yourbusiness.com, the TLD is .com. In charityname.org, it's .org.

TLDs are managed by the Internet Assigned Numbers Authority (IANA) and delegated to registries around the world. Every domain name on the internet ends with a TLD, which means every website, every email address, and every piece of your online identity includes one.

There are currently over 1,500 TLDs available globally. That's a lot of options—which is why understanding the categories and common examples makes choosing far easier.

How TLDs are organized

TLDs fall into a few main categories. Each one has a different origin, purpose, and set of associations.

Generic TLDs (gTLDs)

Generic TLDs are the most widely used and globally recognized extensions. They're not tied to a specific country or organization. Most of the domains you encounter every day—commercial websites, blogs, personal brands—use a gTLD.

Common generic TLDs include:

• .com – The most recognized TLD in the world. Originally intended for commercial use, it's now the default for businesses, brands, and individuals across every industry. When in doubt, .com carries the most universal credibility and familiarity.

• .org – Originally reserved for nonprofit organizations. Today, it's widely associated with nonprofits, foundations, open-source projects, and community organizations. It signals trust and public benefit.

• .net – Originally intended for network infrastructure providers. It's now a general-purpose extension used by a wide range of businesses, especially in technology and communications.

• .info – Designed for informational websites. It's less prominent than .com or .org but works well for resource libraries, reference sites, and directories.

• .biz – Created as a business-focused alternative to .com. It sees moderate use but doesn't carry the same weight as .com in most markets.

Country-Code TLDs (ccTLDs)

Every country in the world has its own two-letter TLD. These are called country-code TLDs, and they're assigned based on the ISO 3166 standard. A ccTLD signals geographic relevance and can be a strong asset if your business serves a specific country or region.

Common country-code TLDs include:

• .us – United States

• .uk – United Kingdom

• .ca – Canada

• .au – Australia

• .de – Germany

• .fr – France

• .jp – Japan

• .br – Brazil

• .in – India

• .mx – Mexico

Some ccTLDs have taken on a second life as general-purpose extensions because of how they look or read:

• .co – Colombia's country code, but widely adopted globally as a shorter, cleaner alternative to .com. Popular with startups and modern brands.

• .cc – Cocos (Keeling) Islands' country code, but used internationally as a flexible, open extension—especially for brands that want a clean, short ending without geographic restriction.

• .io – Assigned to the British Indian Ocean Territory, but closely associated with technology, software, and startups. Widely used in the tech industry as a signal of innovation.

• .tv – Tuvalu's country code, but broadly adopted by media companies, streamers, and video platforms because of its obvious fit with television and video content.

• .fm – Federated States of Micronesia, commonly used by radio stations, podcasters, and music platforms.

Sponsored TLDs (sTLDs)

Sponsored TLDs are restricted extensions managed by specific organizations. Registration is typically limited to entities that meet defined eligibility criteria.

Examples include:

• .edu – Reserved for accredited educational institutions in the United States

• .gov – Reserved for U.S. government entities

• .mil – Reserved for the U.S. military

• .aero – For the aviation industry

• .museum – For accredited museums

Unless your organization qualifies, these extensions won't be available to you—but they're worth knowing because they carry strong credibility signals within their sectors.

New Generic TLDs (New gTLDs)

Since 2013, hundreds of new descriptive TLDs have been introduced through ICANN's expansion program. These extensions let brands choose a domain ending that directly describes what they do or who they are.

Popular new gTLDs include:

• .shop – For e-commerce and retail brands

• .store – Another strong option for online shops

• .app – For software applications and app developers

• .blog – For content creators and bloggers

• .studio – For creative businesses, design studios, and media companies

• .agency – For marketing, PR, and creative agencies

• .health – For health-related businesses and wellness brands

• .tech – For technology companies and developers

• .design – For designers and design-focused brands

• .photography – For photographers

• .restaurant – For food and beverage businesses

• .nyc, .london, .tokyo – City-based TLDs for locally rooted businesses

These extensions can make your domain more descriptive and memorable, particularly if your preferred .com name is taken.

How to use a TLD list

A TLD list is a reference tool—it helps you understand what's available, what each extension signals, and how to narrow your choices. Here's how to use one effectively:

Start with your audience

If your customers are primarily in one country, a country-code TLD might strengthen your local credibility. If you're building a global brand, a widely recognized gTLD like .com is usually the stronger choice.

Consider what your TLD signals

Extensions carry associations. A .org domain signals nonprofit or community purpose. A .io domain signals tech. A .shop domain signals e-commerce. Choose an extension that aligns with how you want your brand to be perceived.

Check availability and alternatives

If your first choice isn't available as a .com, you have real options. A .co or .io extension can work well depending on your industry. A descriptive new gTLD like .studio or .agency might be even more on-brand than a generic alternative.

Prioritize memorability

The best domain is the one people can remember, type correctly, and trust. A short, clear name with a familiar TLD will almost always outperform a long, creative name with an unfamiliar extension.

Common TLD Examples at a Glance

• .com – Businesses, brands, individuals—universal default

• .org – Nonprofits, foundations, open-source projects

• .net – Technology, networking, general business

• .io – Tech startups, software, developer tools

• .co – Modern brands, startups, global businesses

• .cc –Flexible, open use—international brands

• .us –U.S.-based businesses and local services

• .uk –UK-based businesses

• .shop – E-commerce, retail, online stores

• .app – Software products, mobile apps

• .blog – Content creators, writers, media brands

• .studio – Creative businesses, design, production

• .edu – Accredited educational institutions

• .gov –U.S. government agencies

How to choose the right TLD for your brand

Choosing a TLD isn't just a technical decision—it's a branding one. Here are a few principles to guide your choice:

Default to .com when you can

It's still the most trusted, most recognized, and most expected extension globally. If your name is available as a .com, it's usually the best starting point.

Use a ccTLD for local credibility

If you serve a specific country and your audience expects a local domain, a ccTLD can strengthen that connection. A local bakery in the UK, for example, might be better served by a .uk domain than a .com.

Let your industry guide you

If you're building in tech, .io is widely understood and respected. If you're opening an online shop, .shop immediately communicates what you do. Let the extension reinforce what you are.

Don't sacrifice a great name for a familiar extension

A memorable, brand-right name with a slightly less common TLD often performs better than a generic, forgettable name with a .com.

Protect your brand across extensions

If you register yourbrand.com, consider also registering yourbrand.co or other close alternatives to prevent confusion and protect your identity as you grow.

Register your domain with Squarespace

Once you've identified the TLD that fits your brand, the next step is registration. Squarespace makes it simple to search for available domains, compare extensions, and register your name—all from one place.

When you register your domain with Squarespace, you can also build your website and connect a professional business email address through Google Workspace. Everything you need to establish your brand online is in one place, with no technical expertise required.

A TLD list is more than a catalog of endings—it's a guide to how the internet is organized and how your brand fits into it. Understanding the difference between a generic extension, a country-code domain, and a newer descriptive TLD helps you make a more intentional choice, one that supports your brand, speaks to your audience, and sets your business up for long-term recognition.

Start with what fits your brand, check availability, and register before someone else does. Your domain is the foundation of everything you build online.