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|Introduced||13 October 1989|
|TLD type||Country code top-level domain|
|Registry||Universidad Nacional de Ingeniería|
|Sponsor||Universidad Nacional de Ingeniería|
|Intended use||Entities connected with Nicaragua|
|Actual use||Popular in Nicaragua; co.ni subdomain is being promoted in Northern Ireland with limited success|
|Structure||Registrations are made at the third level beneath second-level names|
|Documents||.ni Rules (Spanish)[dead link]|
Archived 24 September 2006 at the Wayback Machine);
co.ni rules[dead link]
Archived 28 September 2007 at the Wayback Machine
Registrations are at the third level beneath several second level names. There are also a handful of sites directly at the second level, including the registry site itself at nic.ni.
For political and/or marketing reasons, .ni is also occasionally registered and used by sites based in Northern Ireland, rather than the United Kingdom's official ccTLD, .uk (or Ireland's .ie). The .co.ni subdomain is available for this purpose with the clear understanding that .co.ni is a subdomain of the .ni domain, which is the top level domain name for Nicaragua and as such subject to the terms and conditions of the .ni registry in Nicaragua.