Suitable for any type of business, widely recognized and versatile.
Originally intended for network-related businesses, but now used by various industries.
Ideal for non-profit organizations, charities, and advocacy groups.
Perfect for technology-forward businesses or agencies using artificial intelligence.
Popular among tech startups and companies in the technology industry.
A modern and flexible domain choice, appealing to creatives and innovators.
Specifically for mobile apps and application developers, with built-in security features.
Tailored for e-commerce businesses and online retail stores.
Suitable for informational websites, blogs, and knowledge-based platforms.
Often used as an alternative to .com, ideal for businesses and startups.
Alternative for e-commerce businesses and online retail stores.
Versatile and professional, fitting for personal, business, or portfolio websites.
A global choice for digital-first businesses, freelancers, or anyone building an online presence.
Designed for developers, coders, and tech communities with enhanced security.
Focused on technology companies, startups, and innovators in the tech space.
Browse hundreds of niche TLDs tailored to specific industries, regions, and communities.
Each TLD has its own search tool with live availability, pricing data, and market stats. Pick any extension and start searching.
I've used Instant Domain Search for years. It's the fastest way to find and check domain availability.
Dharmesh Shah
Founder, HubSpot
Instant is one of those tools I show people and they immediately get it.
Pranav Mital
PM, Clay
Blown away with the speed, haven't seen anything like it before.
Noah Finer
Software Engineer, Figma
And many more...
A domain extension (also called a TLD or top-level domain) is the part of a domain name that comes after the dot, like .com, .net, or .org. Extensions tell visitors something about your website: .com is the universal default, .org signals a nonprofit, and newer options like .ai, .io, or .store indicate your industry. There are over 800 extensions to choose from, ranging from generic TLDs like .com to country-code TLDs like .ca or .de. See the full list on this page or use the search bar above to check availability.
Type any name into the search bar above and Instant Domain Search checks availability across 800+ extensions in real time as you type. You'll see which extensions are available, what each one costs across multiple registrars, and alternatives if your first choice is taken. You can also use our main domain search tool to see availability, AI-generated suggestions, and aftermarket listings all at once. No other tool checks this many extensions this fast.
The most registered extension worldwide is .com, followed by country-code TLDs like .de (Germany), .cn (China), and .uk (United Kingdom). Among generic TLDs, .net, .org, .info, and .xyz are widely used. For tech companies, .ai and .io have become industry standards. E-commerce businesses often choose .shop or .store. The "best" extension depends on your audience and industry, not just popularity. Browse all options on our domain extensions page or read our guide on popular domain extensions.
They all refer to the same thing: the part after the dot in a domain name. "TLD" (top-level domain) is the technical term used by ICANN and the domain industry. "Domain extension" and "domain suffix" are informal names for the same concept. Whether you call it a TLD, extension, or suffix, .com is still .com. The only distinction worth noting is between generic TLDs (like .com, .net, .org) and country-code TLDs (like .ca, .uk, .de), which sometimes have residency requirements.
For most businesses, .com is the safest bet because it's what people type by default. If .com isn't available at a reasonable price, consider: .co (short, professional), .io or .ai (tech and AI companies), .org (nonprofits), .app or .dev (software), .store or .shop (e-commerce). Country-code extensions like .ca or .co.uk work well if you serve a specific region. The key is matching the extension to your audience's expectations. Use our extension search to compare pricing, or read our guide on choosing the right domain extension.
No. Instant Domain Search compares pricing from 8 registrars simultaneously for every extension, so you see the lowest price without visiting GoDaddy, Namecheap, Porkbun, and others individually. Most registrar search tools only show their own pricing. We show them all side by side as you type, making it easy to spot the best deal for any extension. For checking large batches of names at once, use our bulk domain search tool.
This is the most common situation. Here's what to try: first, check other extensions on this page — maybe the .co, .io, or .ai version is available and actually fits your brand better. Second, try our AI domain name generator to find creative variations of your original idea that have .com available. Third, check the aftermarket to see if the .com is listed for sale. You might be able to buy it directly from the current owner. Fourth, you can save domains to your saved domains list and come back to compare later.
