.one domains: who runs them, cost and rules
A .one domain is a web address ending in .one, a generic extension run by One.com A/S, a Danish sister company of the European web host one.com. Anyone can register one, with no business or residency rules, and at the registrars we checked on 21 October 2026 the first year cost about US$5 and renewals about US$20, or $46.75 a year at an Australian registrar.
Who runs .one
IANA, which keeps the official list of internet extensions, records the manager of .one as One.com A/S, of Copenhagen, and ICANN's registry agreement listing names the same company as operator. The registry's own website, get.one, trades as One Registry from the same Copenhagen address. Its policies page says the technical work is done by GoDaddy Registry.
One.com is the hosting company in the same group. Its about page says it was founded in Denmark in 2002, is now part of group.one, and that "we run the .one top-level domain". So if you searched "one domains" and found both, they are the same family.
You do not buy from the registry directly. You buy a .one from a registrar, the same way you would buy a .com.
When it launched
The timeline, from the records:
- 7 November 2014: the date of the registry agreement with ICANN.
- 22 January 2015: .one went live in the internet's root (IANA: "Delegated since 2015-01-22").
- 4 March to 5 May 2015: the sunrise period, when trade mark holders could register their marks first, per ICANN's launch records.
- 20 May 2015: registration opened to everyone. ICANN's records show the trade mark claims period opening that day, and a trade blog the next day reported that .one had "launched into general availability (GA) yesterday", with 3,434 names on its books. The registry had registered 279 of those itself, including The.One.
It is far bigger now. The registry's Why .one page says there were "over 250,000 .one domains registered" as of December 2024, and Porkbun's .one page counted 263,658 as of 19 October 2026.
Registration rules
There are very few. The registry's registration policies say plainly: "The .one TLD is an open TLD." You do not need a business, an ABN or a trade mark, and names go to whoever asks first.
The name itself can use letters, numbers and hyphens, from 1 to 63 characters, but cannot begin or end with a hyphen. The registry keeps some names back, including generic names related to its own business.
Three clauses in those policies are worth knowing before you build a business on a .one:
The rules can change without warning. Clause 14.1 says amendments take effect when published on the registry's website, "without prior notice" to registrants.
A trade mark claim can freeze your name. Under clause 3.5, if the registry is told that someone else holds an eligible trade mark matching your name, it may suspend or cancel your registration at its own discretion, at least until it has enough assurances from you and from whoever raised the claim.
These are a different footing from .com.au, where the rules are set by auDA, the Australian not-for-profit that administers .au.
What it costs
These are the prices each registrar showed on 21 October 2026. They change often, so check before you buy.
| Registrar | First year | Renews at |
|---|---|---|
| Porkbun | US$4.63 (sale) | US$20.08 |
| One.com | US$4.99 (offer) | US$19.99 |
| VentraIP | $46.75 | $46.75 |
One.com shows US$19.99 crossed out beside its first-year price, and lists the first year as free with a hosting plan. VentraIP is an Australian registrar; its page shows dollar amounts without naming a currency, so confirm it at checkout.
The renewal price is the one you will live with. At today's prices, five years of a .one costs US$84.95 at Porkbun (US$4.63 plus four renewals at US$20.08) and the same at One.com. At VentraIP it costs $233.75.
For comparison, VentraIP's .com.au page showed $9.95 for the first year (a sale, down from $22.95) and $22.95 to renew. Five years of that .com.au is $101.75, less than half the five-year cost of a .one at the same registrar.
Who uses it
The live .one sites we found tend to have "one" built into the brand, so the extension finishes the name rather than sitting after it. Two that loaded on 21 October 2026:
- build.one, the home of the B1 Framework, a software tool whose page title reads "Build with AI, Ship Enterprise."
- universal.one, a healthcare technology company that describes itself as "connecting patients, providers, insurers and partners on one digital platform".
That is the honest test for a .one. If the word belongs in your name, it can read well. If it does not, customers may hear it as a stray word on the end.
.one or .com.au for an Australian business
Eligibility. A .com.au needs proof that you are a commercial entity with a connection to Australia. auDA's .com.au page says "Usually this is an Australian Business Number (ABN) or Australian Company Number (ACN)", and the name must connect to your business, such as your business name or a service you offer. A .one asks for nothing. That is convenient, and it also means anyone in the world can register your business name as a .one.
Search. Google said in 2015 that its systems treat new extensions like .com and .org, and "Keywords in a TLD do not give any advantage or disadvantage in search." Country extensions are different. Google's guide to multi-regional sites says they are "tied to a specific country" and "provide a strong signal to both users and search engines that your site is explicitly intended for a certain country". A .one carries no such signal. If most of your customers search from Australia, that favours .com.au.
Trust. auDA, which has an obvious interest here, says on its .com.au page that "Half of Aussie consumers will only purchase from a website with a .au address." We could not find an independent study of how Australians read .one addresses in particular.
What we would do. If you have an ABN and sell mainly to Australians, start with the .com.au. Consider a .one as well when "one" is genuinely part of your brand or product name, or when you sell well beyond Australia and the .com is taken. Either way, if you are eligible, register your business name in .com.au too, so nobody else can.
If the .com.au you want is already registered, the holder may be willing to sell. Dotto is a marketplace for names already registered and offered by their holders, mostly .com.au and .au.