.ac

{{Short description|Country code top-level domain for Ascension Island}}

{{about|the country code top-level domain|the second-level domain|.ac (second-level domain)}}

{{Infobox Top level domain

| name=.ac

| image=.ac ccTLD logo.png

| introduced={{Start date and age|1997|12|19}}

| type=Country code top-level domain

| status=Active

| registry=Ascension Island Network Information Centre (run by Internet Computer Bureau)

| sponsor=Sure

| intendeduse=Entities connected with Ascension Island

| actualuse=Various uses, sometimes connected to education and academia; a few sites actually on Ascension Island. Popular among websites related to Animal Crossing.

| restrictions=3rd level registrant must be resident on Ascension Island

| structure=Registrations are taken directly at the second level or at third level beneath various 2nd-level labels

| document=[https://www.nic.ac/terms.htm Terms & Conditions]; [https://www.nic.ac/rules.htm Rules]

| disputepolicy=[https://www.nic.ac/dres.html Dispute Resolution Policy]

| website={{URL|https://nic.ac}}

| dnssec=Yes}}

The .ac top-level domain is the Internet country code (ccTLD) for Saint Helena, Ascension and Tristan da Cunha, used primarily for Ascension Island (Saint Helena has its own ccTLD, .sh). It is administered by NIC.AC, a subsidiary of the Afilias-owned company Internet Computer Bureau.

Registration for the domain is open to anyone. The registry accepts registrations of internationalized domain names.{{cite web

|url = https://www.nic.ac/pdf/AC-IDN-Policy.pdf

|title = IDN Code Points Policy for the .AC Top Level Domain

|publisher = nic.ac

|date = 2013-05-20

|access-date = 2013-05-23

|archive-url = https://web.archive.org/web/20140806092102/https://www.nic.ac/pdf/AC-IDN-Policy.pdf

|archive-date = 2014-08-06

|url-status = dead

}}