.io Domain: The Short Address for Tech Projects
.io is technically the country code domain (ccTLD) of the British Indian Ocean Territory; the registry is Internet Computer Bureau Limited and the extension entered the root zone on 16 September 1997. Today it is used mainly across the technology world: because it matches the computing abbreviation 'input/output', developer tools, APIs, open source projects and newly founded software companies gravitate to it.
You need no connection to the territory in order to register. Names are issued on a first come, first served basis, applicants do not have to be registered or resident in the British Indian Ocean Territory, and no documents are requested. If your product speaks to developers, a .io address sends a signal your audience already recognises. If you sell to corporate buyers, it is worth weighing that same technical connotation.
Because it is only two letters, short and memorable names go quickly here, yet meaningful word combinations are still available. Researching a spelling that matches your product name exactly will noticeably simplify your later brand communication, since people tend to type what they hear. Check whether the name you have in mind is free on the domain search page.
.IO Domain at a Glance
- Registry Internet Computer Bureau Limited (nic.io)
- Delegated 16 September 1997
- Allocation basis First come, first served
- Prominent use Technology companies, open source projects and APIs
- Document Requirement No documents are required to register a .io domain
- Country British Indian Ocean Territory
- Character Length 3 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 1 - 13 servers
.io Domain Prices — No Surprise Fees
Registration, transfer and renewal fees are listed separately. The renewal price can differ from the first-year price, so you see both up front.
-
New Registration
$44.99 /year -
Transfer
$64.99 /year -
Renewal
$69.99 /year -
Restore
$169.90 -
Late Renewal
$11.98
Included With Every .io Domain
-
Free DNS management
Change A, MX, TXT and CNAME records yourself from the panel — no waiting on anyone when you move a site or mailbox.
-
Domain lock
While the lock is on, nobody can move your domain to another registrar without your approval.
-
Domain forwarding
Point the domain at your existing site, a campaign page or a social profile — at no extra cost.
-
Free WHOIS privacy
Your name, address and phone stay out of public WHOIS records, which cuts down spam and scam calls.
.io Domain Lifecycle
What happens day by day after it expires
Day 0 is the domain's expiry dateIn short: for .io the post-expiry timeline is set by the registry, so it differs from one extension to the next. The diagram below shows the windows that actually apply to .io, day by day. One thing never changes, whichever extension you hold: renewing before the expiry date is always the cheapest and safest route.
Domain Is Available (Available)
A .io address at this stage has not been taken yet, and it goes to whoever registers first. Check the name you have in mind — if it is free, it can be yours within minutes.
Domain Is Active (Active Period)
Once registration is complete, the domain is registered to you for the term you selected. You can renew at any point before it expires to keep it active, or switch on auto-renewal so you never have to watch the date.
Redemption Period (Redemption Period)
The domain is not released the moment it expires — during this window it is still yours and can be recovered. Some extensions charge an extra restore fee at this stage, so renewing before expiry is always the cheaper route.
Pending Delete Period (Pending Delete Period)
If the redemption window is missed too, the domain enters the final stage and waits to be deleted. Renewal and recovery are no longer possible here; when the period ends the registration is removed for good.
Domain Is Available Again
Once deletion completes, the domain leaves the system and anyone can register it — popular names are often taken the same minute by someone watching. Keep auto-renewal on so a name you care about never gets this far.
.io Domain Specifications and Registration Rules
Registration conditions, supported features and the registry's own timelines in a single table.
.io Domain Registration
- Document Requirement No documents are required to register a .io domain
- Country British Indian Ocean Territory
- Character Length 3 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 1 - 13 servers
.io Domain Support
- IDN Support No
- Transfer Support Yes
- Late Renewal Support Yes
Frequently Asked Questions About .io Domains
The questions people actually ask before registering — answered plainly.
-
No. .io names are issued on a first come, first served basis; applicants do not need to be registered or resident in the British Indian Ocean Territory, and no documents are requested at registration. A company applying from abroad and an individual developer can both hold the name in their own right. In practice the process runs like registration in any international extension.
-
In October 2024 the United Kingdom announced it would transfer sovereignty over the territory to Mauritius, which is what started the questions about this extension. According to ICANN's statement, the existence of country code extensions is tied to the ISO 3166-1 standard; a change of sovereignty does not automatically mean the extension goes away, and even if it did, ICANN policy allows a great deal of time to adapt. There is no closure date today.
-
Because the extension matches 'input/output', the computing abbreviation for data going in and out. That association settled in over time and became a shared habit among developer tools, API services, open source projects and newly founded software companies. The effect is practical: for a product aimed at developers, a .io address already feels familiar before you have explained anything.
-
Yes, a privacy service is available on this extension, so your registration details can be masked in lookup results. You can see what any given name returns today on the whois search page. Even with privacy enabled the domain remains registered to you; the service only keeps your contact details out of the public lookup, it does not change ownership.
-
A transfer starts when you obtain the authorisation code from your current provider and confirm the name is not locked against transfer. Your site and email keep working while it runs, and the registration time you have left is preserved. Do not try to move a name you have only just registered, as transfers are usually refused in the first days. Start on the domain transfer page.
-
If your product is growing, this is a common and sensible approach. Holding both keeps the name from being taken by someone else and leaves you room if your positioning changes later. Publish on one address and redirect the other; running two live sites splits your visitors and your search signals. You can check availability in one pass with bulk domain search.
Ready to Claim Your .io Domain?
Type a name and see in seconds whether it is free on .io. If it is taken, we list close alternatives right away.
Get Help for .io Domain Registration
Need help registering a .io domain? Our team is ready to assist.