|Introduced||3 September 1991|
|TLD type||Country code top-level domain|
|Registry||Trinidad and Tobago Network Information Centre (TTNIC)|
|Sponsor||University of the West Indies (Faculty of Engineering)|
|Intended use||Entities connected with Trinidad and Tobago|
|Actual use||Used largely in Trinidad and Tobago, with a scattering of other use including free third-level subdomains offered by outside vendor|
|Registration restrictions||None (except under .gov.tt, .mil.tt and .edu.tt)|
|Structure||Registrations permitted directly at second level or at third level beneath various labels|
|Documents||Terms and conditions|
The Trinidad and Tobago Network Information Centre (TTNIC) allows registrations under tt for second-level domains, and for third-level domains under the following domains: co.tt, com.tt, org.tt, net.tt, biz.tt, info.tt, pro.tt, int.tt, coop.tt, jobs.tt, mobi.tt, travel.tt, museum.tt, aero.tt, tel.tt and name.tt. Registration under the above domains is unrestricted and the registry does not require applicants to have a physical presence in Trinidad and Tobago. However, registrants with a foreign address are charged double.
In addition, there is mil.tt, restricted to entities in the Military of Trinidad and Tobago, edu.tt is a registry for educational institutions in Trinidad and Tobago, and gov.tt reserved for agencies of the government.
- "Trinidad and Tobago Network Information Centre". Archived from the original on 24 September 2005. Retrieved 27 September 2005.
- "TTNIC Registration fees". Retrieved 24 August 2011.
- "edu.tt". Archived from the original on 24 June 2009. Retrieved 24 June 2009.
- "Romney to quit Libyan domain". Ben Smith on Politics and Media. Politico. 2010-10-06. Retrieved 2012-09-20.