The registry Web site, as of 2006, has not been modified since 2002, and consists of a single page in Portuguese. One of the few links on the page is to a document in Microsoft Word format, in English, which gives registration rules for the domain which may not be up-to-date; they state that registration by entities outside Angola is to be done only in the .it.ao subdomain. The search engine Google seems to be the unique entity[1] using the subdomain ".it.ao". It also say that registrations are only taken at the third level (when a Google search shows some sites exist at second-level .ao names).
Second level domains
.ed.ao - Educational institutions. (Seated in Angola.)
.gv.ao - Governmental institutions. (Seated in Angola.)
.og.ao - Any other organisations (Seated in Angola.)
.co.ao - Commercial institutions (Seated in Angola.)
.pb.ao - Publishing (Seated in Angola. Not used?)
.it.ao - International institutions (Outside Angola. Not used?)