Your domain name is the first impression you give online, and often the start of everything else: your website, your brand, and a professional email that customers will trust.
It’s free to check if that winning domain is available, takes only seconds, and could be the first step towards bringing that big idea to life.
Key Takeaways — Domain Availability
- ☑︎ It’s free and easy to check domain availability. Find your perfect domain in seconds with 123 Reg.
- ☑︎ First come, first served. Available today doesn’t mean available tomorrow.
- ☑︎ Taken? Tweak it. Add a location or try a different extension for a strong alternative.
- ☑︎ Protect your domain. Auto-renew keeps it from lapsing. Adding Domain Ownership Protection helps lock it down.
- ☑︎ Need inspiration? 123 Reg’s AI Domain Search can come up with names based on your business description.
Why check if a domain name is available before you build a brand?
Perhaps you’ve already got a business name you love, or you’re still looking for inspiration.
Either way, checking domain availability is a smart first step. Before you commit to a logo, website or business cards, make sure your ideal domain is available. You might even discover a name you like more through the suggestions a domain search brings up.
A domain search takes seconds. Here are five reasons to check availability before you get started:
✓ Protect your brand name online
Your domain is a core part of your identity online. If someone else registers it first, you could end up with an awkward alternative, or find yourself paying a hefty sum to buy it back from the new owner.
✓ Build local trust and SEO
For UK businesses, a .co.uk or .uk ending tells customers (and signals to search engines) where you operate. That’s helpful for Search Engine Optimisation (SEO) — helping to get your business found online.
✓ Avoid paying aftermarket prices
Most available domains are sold at standard registration rates. Once a name is taken, you’re at the mercy of the aftermarket, where prices can climb into the hundreds or even thousands. A few minutes of searching now can save a lot of money later.
✓ Find that perfect website and email address
Knowing your domain is locked in means one less thing to worry about as you build out your website, email, and brand. You can move forward with confidence, knowing that address is yours.
For more, check out: What is a Domain Name? A Beginner’s Guide to Domains
Where to check domain availability in the UK
You don’t need any special tools or technical know-how to find out if a domain is available. A few trusted options will give you the answer in seconds.
Use 123 Reg’s free Domain Name Search
The simplest way to check is to head straight to the 123 Reg domain search page. Just type in the name you have in mind and hit search. You’ll see instantly whether it’s available, along with a list of alternative extensions and similar names if your first choice is already taken.
Step-by-Step: How to check if a domain name is available
Follow these five steps to find a name that works for your business:
1. Brainstorm a short, memorable domain name
Start with your business name, or a short phrase that sums up what you do. Keep it simple, easy to spell, and easy to say out loud. Avoid numbers and hyphens if you can, as they make a domain harder to remember and more prone to typos.
2. Pick the right domain ending (TLD) for your business
Think about which domain endings suit your audience. For most UK businesses, .co.uk or .uk is the natural choice. If you have international ambitions, .com is worth considering too. You might also look at niche options like .london, .scot, or .wales if they fit your brand.
3. Search for your domain name
Head to the 123 Reg domain search page and type in your chosen name. Within seconds, you’ll see whether it’s available and at what price. You’ll also be shown alternatives if your first pick is already registered.
4. Review alternative domain suggestions
If the exact name you wanted is taken, don’t panic. The search results will show you similar options, different extensions, and variations with added keywords. Often, a small tweak is all it takes to find something just as good.
5. Say that domain name out loud
Choose a domain that’s memorable, easy to spell and fits your brand. Think about how it’ll look on your website, business cards, and for your matching custom email address.
For more, check out: How to Buy and Register a Domain Name in the UK
Domain name already taken? Here’s what to do next
Finding out your ideal domain is already registered can be frustrating, but don’t give up just yet. A small change to your name or domain ending could open up more options than you’d expect.
Add a keyword or location to your domain name
You might be surprised just how easy it is to find a good .co.uk or .com by adding a little extra something to your domain name. If livemusic.co.uk is taken, for example, try a small variation that still reflects your location, like livemusicbristol.co.uk or bristol-livemusic.co.uk.
Explore different domain extensions
You’re certainly not limited to .co.uk and .com. There are over 400 domain extensions (or TLDs) to choose from, with great new endings being released all the time. From .shop and .store to more location-specific options like .london, there’s plenty of room to explore.
For more, check out: How to Choose the Best Domain Ending in 2026
Find inspiration with AI Domain Search
Still stuck for ideas? Try 123 Reg’s AI Domain Search. Describe your business in a few words and it’ll generate relevant domain name suggestions to help you find a name that fits your brand. It may even help you come up with a business name, too!
How much does it cost to register a domain in the UK?
Registering a domain is often more affordable than you might think.
Prices vary depending on the extension and provider, with plenty of low-cost options to help you get started. It’s worth checking both the first-year price and the renewal cost so you can find an option that suits your budget long term.
First-year vs renewal pricing
Many registrars offer introductory prices to make getting started more affordable. A .co.uk domain might cost just a few pounds in your first year, while promotional offers on .com domains can sometimes bring the price down to as little as £0.01.
As domains need renewing, it’s worth checking the ongoing price too, so you know what to budget for in the years ahead.
Here’s a rough guide to the prices you can expect for some popular domain extensions in the UK:
Popular domain extensions with 123 Reg*
| Extension | First year | Renewal | Focus |
|---|---|---|---|
| .co.uk | £3.99 | £12.99 | UK identity |
| .uk | £3.99 | £12.99 | UK identity |
| .com | £0.01 | £18.99 | Global reach |
| .info | £4.99 | £32.99 | Sharing knowledge |
| .ltd | £1.84 | £77.99 | Company branding |
| .online | £0.99 | £40.99 | Online-first ideas |
| .store | £13.99 | £51.84 | Selling online |
*Prices correct as of October 2026 and subject to change.
See also: How Much Does a Domain Name Cost in the UK? and The Cheapest UK Domain Registrars Compared
Watch out for VAT and hidden fees
Some advertised prices don’t include VAT, so the total at checkout could be higher than expected. Before you buy, make sure you’re looking at the full cost including any taxes or add-ons.
For more, check out: What’s Included Free with a 123 Reg Domain Name?
How to protect your domain after registration
Once your domain is registered, a few simple steps will keep it safe:
Check auto-renew is on
Auto-renew is usually switched on by default, but it’s worth checking your account settings. It means your domain renews automatically when it’s due, helping you avoid accidentally letting it expire. If you miss a renewal, you could eventually lose the domain to someone else.
Lock it down with Domain Ownership Protection
Domain Ownership Protection goes a step further, locking your domain down so nobody can make unauthorised changes to it. It helps prevent unauthorised changes to your domain and notifies you when changes are made to your domain details, so you can keep an eye on anything unexpected.
Keep your details private
WHOIS privacy protection helps keep your personal contact details out of the public WHOIS database. That means less exposure to spam and unwanted contact, while helping protect your privacy. Many 123 Reg domains come with Domain Privacy as standard, but be sure to check.
Register matching extensions, if you like
If you use a .co.uk domain, you might want to register the matching .com too. It helps stop someone else registering that version and means customers have a better chance of finding you, whichever one they type. You don’t need to register every extension, but securing the main alternatives can be worthwhile for your brand.
Ready to find your domain?
Domain Availability Checklist
Before you register, run through this quick checklist to make sure you’re ready.
☐ Brainstormed your ideal name and a few alternatives
☐ Chosen your primary extension (like .co.uk or .com)
☐ Compared first-year and renewal prices, including VAT
☐ Checked if a 123 Reg hosting plan might include that domain for free
☐ Considered registering matching extensions for brand protection
Checking availability is free and takes seconds. Find your perfect domain with 123 Reg and take the next step towards bringing your idea to life.
Domain Availability FAQ
How do I check if a domain name is available in the UK?
Type your chosen name into the 123 Reg domain search and you’ll see within seconds whether it’s available, along with alternative extensions if it’s taken.
Is it free to check domain availability?
Yes. Searching is completely free and there’s no obligation to buy. You only pay if you decide to register a domain, so you can try as many ideas as you like with 123 Reg’s domain search.
What does it mean if a domain is “taken” but the website doesn’t work?
A domain can be registered without a live website, for example if the owner is still building it, has parked it, or is holding it as an investment. A WHOIS lookup can show when it’s due to expire, and if it’s not available, the 123 Reg search will suggest similar names that are.
How long does it take to register a domain once I find one?
Registration is usually quick, often within minutes of checkout. Once it’s yours, you can start building your website and setting up a professional email address right away.
Can I reserve a domain name without buying it?
Not really. Domains are first come, first served, so the only way to secure a name is to register it. If you’ve found one you love, it’s best to grab it before someone else does. Search on 123 Reg and register it today.
What is WHOIS and how do I use it to check domain ownership?
WHOIS is a global directory of domain registration details. A WHOIS lookup can show the registrar, registrant and expiry date. Having domain privacy protection can hide some of these details. An expiry date doesn’t guarantee a domain will become available, as the owner may renew it or have extra time to recover it.
See also: What is the WHOIS Database?
What should I do if the .co.uk version of my domain is taken but .com is available?
If the .co.uk version of your domain is taken but .com is available, think about which ending works best for your target audience. You can register the .com, but check that the .co.uk isn’t a competitor’s site, as UK customers may end up there by mistake. You could also try a .uk domain or add a keyword or location to your name to find an available .co.uk.
See also: .com vs .co.uk — Which is Best for Your British Business?
