Register a .io domain now
Get creative with your URL and a .io country domain to increase your input/output.
Free Wildcard SSL- Free private registration
- Free 2GB email account
Popular with tech startups and more
Why register a .io domain?
Although the .io domain names have been around since as early as 1997, it is still less common than other generic and extremely popular top-level domains (TLDs). The .io country code domains are an attractive option amongst the tech and startup scene, largely due to the fact that the letters stand for input/output.
Input/output represents the fundamental concept of computers: every input results in an output. Businesses, companies and individuals alike can benefit from the creative freedom of choosing their ideal domain name; a meaningful, unique and concise name may be what it takes to position your business ahead of the competition.
What does the .io domain extension stand for?
Despite its popularity amongst the tech industry, where the .io domain is commonly known as an abbreviation for input/output, the .io domain name in fact stands for the British Indian Ocean. As with most TLDs, each country or territory is assigned its own two-letter country code domain. Other country code top-level domains (ccTLDs) include .ca for Canada and .co.uk for the United Kingdom.
In recent years, it is not only the tech and startup industry that has been taking advantage of the catchy country code domains, but also brands or words that are complemented by the .io name such as www.aud.io or www.mustach.io. This has naturally resulted in fewer businesses actually operating in the British Indian Ocean area using this domain extension. It has therefore become less of a representation of the British Indian Ocean, and more of a generic TLD.
Success on the web with your .io domain
Learn more about the benefits of .io domain names from IONOS.
.io domain features | Available |
|---|---|
Minimum and maximum length | 3-63 characters |
Duration of registration | Usually a few hours |
Registration policy | https://www.nic.io/policy.htm?=undefined - - "https://www.nic.io/policy.htm" |
Email account with 2 GB mailbox space |  |
Unlimited subdomains to structure your website | |
1 SSL certificate per domain registry | |
Advanced DNS management | |
Whois privacy included | |
24/7 customer support | |
Fast, simple domain setup | |
Secure your domain from hijacking risks with domain lock | |
Special offers for IONOS customers | |
Minimum and maximum length | |
|---|---|
.io domain features | |
Available | 3-63 characters |
Duration of registration | |
.io domain features | |
Available | Usually a few hours |
Registration policy | |
.io domain features | |
Available | https://www.nic.io/policy.htm?=undefined - - "https://www.nic.io/policy.htm" |
Email account with 2 GB mailbox space | |
.io domain features | |
Available | |
Unlimited subdomains to structure your website | |
.io domain features | |
Available | |
1 SSL certificate per domain registry | |
.io domain features | |
Available | |
Advanced DNS management | |
.io domain features | |
Available | |
Whois privacy included | |
.io domain features | |
Available | |
24/7 customer support | |
.io domain features | |
Available | |
Fast, simple domain setup | |
.io domain features | |
Available | |
Secure your domain from hijacking risks with domain lock | |
.io domain features | |
Available | |
Special offers for IONOS customers | |
.io domain features | |
Available | |
.io domain
FAQ – Frequently asked questions
Getting a .io domain with IONOS couldn't be any easier. Simply enter your desired web address in the search bar and with just the click of a mouse, you'll find out if it is still available. If so, you can buy your .io domain directly, easily and cheaply. Our tip: make sure you get the domain you want before someone else does. Otherwise, it may already be taken, and can only be acquired if the website owner violates your name or trademark rights. At worst, this will then require litigation. All of this can be avoided by securing your .io domain early.
As soon as you have checked if your .io domain is available, you can also check if there are other domains available that you are interested in. You will automatically receive suggestions for additional domain names or top-level domains that may not have crossed your mind yet, but which may also be of interest to you. If this is the case, you can also place the corresponding domains in your shopping cart, and complete the purchase.
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Learn more about domains
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We're always working to improve our customer support, and we're proud to have won several awards. These include Best Customer Engagement Initiative and Best Use of Customer Insight.
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