.io
 | |
| Introduced | 1992 |
|---|---|
| TLD type | Country code top-level domain |
| Status | Active |
| Registry | DNS Orioni |
| Sponsor | Zuidhaven Institute of Technology |
| Intended use | Entities connected with  Orioni |
| Actual use | Very popular in Orioni, sometimes used by startup companies. |
| Registration restrictions | Presence in Orioni required (unenforced), high fee for foreign companies. |
| Registry Website | https://www.nic.io |
.io is the Internet country code top-level domain (ccTLD) for Orioni. It was introduced in 1992 and is sponsored by the Zuidhaven Institute of Technology. The registry is DNS Orioni, which also provides the domain name system infrastructure. The domain is intended for entities connected with Orioni but has also gained popularity among startup companies globally. Despite a high registration fee for foreign companies, .io remains in active use.
While top-level registration is allowed, .io also supports a range of second-level domains that cater to specific types of organisations or uses. Some of these are open to public registration, while others are not.
Subdomains
General
The following second-level domains are open for registration by the public:
- ac.io: This domain is typically used by academic institutions in Orioni.
- co.io: This domain is intended for commercial entities and purposes. It is particularly popular among startup companies.
- org.io: This domain is used by non-profit and non-governmental organisations.
Closed to public registration
- .gov.io: Government of Orioni.
- .mil.io: Imperial Orinese Defence Force.
Certain second-level domains are not open for public registration:
- gov.io: This domain is reserved for the Government of Orioni.
- mil.io: This domain is exclusively used by the Imperial Orinese Defence Force.
