|Introduced||3 September 1991|
|TLD type||Country code top-level domain|
|Intended use||Entities connected with Antigua and Barbuda|
|Actual use||Sees some use, most of which is unrelated to Antigua and Barbuda; used largely by companies in German-speaking countries where AG has a special meaning in company names, though its use in Germany is restricted by court order|
|Structure||Names can be registered directly at the second level; third-level registrations are also available under some second-level labels|
|Documents||Registration terms and conditions|
.ag is the Internet country code top-level domain (ccTLD) for Antigua and Barbuda.
Registrations can be made at the second level directly beneath .ag, or at the third level beneath:
There are no restrictions on who can register.
In addition to its original intended use as a country code, the .ag domain has been marketed for use for agriculture-related sites, and for sites referencing the atomic symbol for silver, Ag. It also has a potential use for other domain hacks for English words that end in -ag. The Heritage Foundation uses .ag for URL shortening (herit.ag).
Aktiengesellschaft, abbreviated AG, is a German term that refers to a corporation that is limited by shares, i.e. owned by shareholders, and may be traded on a stock market. The term is used in Germany, Austria, and Switzerland, but not Liechtenstein or Luxembourg.
A German court (5. Zivilsenat des Oberlandesgerichtes Hamburg) ruled in July 2004 that a .ag domain may only be registered by an Aktiengesellschaft, and then only by an AG that has the same name as the domain. For example, a company with shareholders in Germany having the name X AG may not register as y.ag.