【介绍】
.CA 是加拿大（Canada）的国别或地区域名后缀。
域名管理机构：
Canadian Internet Registration Authority (CIRA)
Autorité Canadienne pour les enregistrements Internet (ACEI)
加拿大互联网注册局（CIRA）
管理机构网址：http://www.cira.ca
WHOIS服务器：whois.cira.ca
【合规】
.CA 域名只允许加拿大的公司或非盈利机构注册使用，域名所有者及管理员联系信息里必须包含有效的加拿大地址。
参考：http://cira.ca/sites/default/files/attachment/policies/cprregistrants-en.pdf
The requirements
(a) Canadian Citizen
(b) Permanent Resident of Canada
(c) Legal Rep. of a Canadian Citizen or Permanent Resident
(d) Canadian Corporation
(e) Trust established in Canada
(f) Partnership Registered in Canada
(g) Canadian Unincorporated Association
(h) Canadian Trade Union
(i) Canadian Political Party
(j) Canadian Educational Institution
(k) Canadian Library, Archive or Museum
(l) Canadian Hospital
(m) Her Majesty the Queen
(n) Indian Band recognized by the Indian Act of Canada
(o) Aboriginal Peoples indigenous to Canada
(p) Government or government entity in Canada
(q) Trademark registered in Canada (by a non-Canadian owner)
(r) Official mark registered in Canada
【查询】
【物料】