Register a .co domain
Register your .co domain with Theory7
- Active immediately after registration
- Free DNS management and DNSSEC
- Friendly support team
Why choose Theory7?
Globally recognized
Popular TLD extensions are recognized and trusted by millions of people. Your domain makes a professional impression right away.
Trust & credibility
An established extension conveys reliability to visitors and customers. Ideal for businesses that want to be taken seriously.
Professional image
Give your brand a professional look with an extension that matches your ambition and target audience.
Widely applicable
Suitable for any type of website: from online store to blog, from portfolio to business site. No restrictions on use.
Instantly available
Register your domain name within minutes. Automatic DNS configuration and instantly linkable to your hosting.
Free SSL & WHOIS privacy
Includes a free SSL certificate and WHOIS privacy protection with every domain registration through Theory7.
Start with your own domain name
Instantly check whether your desired domain name is still available
Frequently asked questions
Yes, Google treats .co as a generic top-level domain (gTLD), not a country-specific domain. This means .co has no advantage or disadvantage compared to .com when it comes to search engine optimization.
Absolutely. Although .co is originally the country code for Colombia, it's used worldwide as a commercial domain. For a Dutch audience, .nl or .com might work better, but .co is a great modern, international option.
This is a common reason to choose .co. Just make sure you communicate .co consistently in your marketing. Also consider registering the .com version later if it becomes available.
Request an EPP code from your current registrar and start the transfer via our domain portal. The transfer usually takes 5-7 days.
Register a .co domain with Theory7
According to Verisign reports more than 350 million registered domain names worldwide.SIDN more than 6 million .nl domain names are registered.
A .co domain is the popular alternative to .com and stands for "company" or "commerce". More and more startups, tech companies, and entrepreneurs choose .co for its short, professional look. At Theory7, you can register your .co domain quickly and reliably.
What is a .co domain?
The .co extension is originally the country code for Colombia, but is used worldwide as a commercial alternative to .com. Since its international launch in 2010, .co has grown enormously in popularity. Well-known users include twitter.co, google.co, and angel.co. The short extension is easy to remember and gives a modern, professional impression.
Benefits of a .co domain
- Short and powerful: just two letters, perfect for branding
- Modern and professional: popular with startups and tech companies
- Better availability: many names taken on .com are still available on .co
- Globally recognized: associated with "company" and "commerce"
- No registration restrictions: anyone can register a .co domain
- SEO-friendly: Google treats .co as a generic TLD (not country-specific)
.co vs .com: what's the difference?
| Feature | .co | .com |
|---|---|---|
| Availability | Good: many names still available | Limited: popular names taken |
| Price | Slightly higher than .com | Usually cheaper |
| Recognition | Growing, especially among startups | Maximum: most well-known TLD |
| Target audience | Startups, tech, modern businesses | Universal |
| SEO treatment | Same as .com (generic TLD) | Generic TLD |
| Confusion | Risk that visitors type .com | No confusion |
Register .co with Theory7
Theory7 makes registering a .co domain simple. With us, you get:
- Immediate activation after registration
- Free DNS management and DNSSEC
- WHOIS privacy included
- Easily connect to hosting and email
- Friendly support team
- Automatic renewal available
Frequently asked questions about .co domains
Is .co good for SEO?
Yes, Google treats .co as a generic top-level domain (gTLD), not a country-specific domain. This means .co has no advantage or disadvantage compared to .com when it comes to search engine optimization.
Can I use .co for a Dutch business?
Absolutely. Although .co is originally the country code for Colombia, it's used worldwide as a commercial domain. For a Dutch audience, .nl or .com might work better, but .co is a great modern, international option.
What if someone already has my .com version?
This is a common reason to choose .co. Just make sure you communicate .co consistently in your marketing. Also consider registering the .com version later if it becomes available.
How do I transfer my .co domain to Theory7?
Request an EPP code from your current registrar and start the transfer via our domain portal. The transfer usually takes 5-7 days.
Tips for choosing a domain name
A good domain name is short, easy to remember, and relevant to your business. Preferably choose a .nl extension for the Dutch market or .com for international reach.
- Keep it short: Easier to remember and fewer typos
- Avoid hyphens: Harder to communicate verbally
- Choose the right extension: .nl for the Netherlands, .be for Belgium, .com for international
- Check availability: Register quickly before someone else does
Choosing the right domain for your project
Your domain name is your online identity. Choose a name that's short, easy to remember, and relevant to your activity. Avoid hyphens and numbers where possible: they make a domain name harder to share.
After registration, your domain is ready to use immediately. At Theory7, you can connect it to hosting, set up email on your own domain, and manage DNS records through a clear control panel. WHOIS privacy is included for free, so your personal details aren't publicly visible.
What's involved in domain registration?
Registering a domain name is technically a simple process, but there are a few things to watch out for. First, a domain name is always a rental agreement: you're never the owner, only the holder. Registration applies for a set period (usually 1 year) and must be renewed afterward. At Theory7, your domain is renewed automatically, so you don't risk accidentally losing it.
During registration, your details are stored with the registry (for .nl domains, that's SIDN). It's important that this information stays up to date, since it's used for dispute resolution and ownership verification. Transferring to another registrar is always possible using an authorization code, which you can request from your current provider. The transfer usually takes a few hours up to a maximum of one day, and your website remains accessible throughout the process.
When should you choose a .co domain?
The .co extension is originally the country code for Colombia, but has grown into a popular alternative to .com. The extension is widely used by startups and technology companies wanting a short, memorable domain name. Well-known examples include Google (g.co) and Twitter (t.co). The advantage of .co is that more names are available than with .com, and the extension is recognized internationally as a professional alternative.
Related services
Discover more about our hosting and domain solutions:
- Create a website: Start your own website today
- Create an email address: Professional email on your own domain
- Check domain name: Check availability instantly
- WordPress hosting: Optimized for WordPress
- WooCommerce hosting: Hosting for your online store
Sources and references
- SIDN: sidn.nl
- ICANN: icann.org
- Verisign: verisign.com
"Recently switched to Theory7 with my domains. Arranging it was cheap, clear and fast!"
