Name Target market Restrictions Operator/Registry IDN DNSSEC .academy academic institutes — Donuts[donuts 1] Yes Yes .accountant accountants and accounting firms — Global Registry Services Ltd[45] Unknown Yes .accountants accountants and accounting firms — Donuts[donuts 2] Yes Yes .active general — The Active Network Unknown Yes .actor actors — Rightside Group[n 1] Yes Yes .ads Charleston Road Registry Inc.[46] .adult adult entertainment (pornography) For sites providing sexually explicit content, such as pornography. Yes Yes .aero air-transport industry Must verify eligibility for registration; only those in various categories of air-travel-related entities may register.