General
- Extension
- .ac
- Type
- Country-code extension
- Meaning
- Ascension Island
- Registry
- Internet Computer Bureau Limited
- Registry website
- www.nic.ac
- Registered since
- 19 December 1997
Properties
- DNSSEC signed
- yes
- Name servers
- 4 (4 with IPv6)
- WHOIS server
- whois.nic.ac
- RDAP server
- none reported to IANA
- At 1blu
- on request via kissdomain
Registration conditions
- Who may register?
- Anyone; place of residence does not matter.
- Short names
- The registry allocates certain names of one or more letters or digits in a controlled procedure.
- Use
- No use for sexual or pornographic content or contrary to applicable law.
- Technology
- Names must comply with RFCs 1034, 1035, 1122 and 1123. The registry may check whether the name servers work.
The registry's current rules are binding: www.nic.ac.
Sources: NIC.AC: Rules · IANA Root Zone Database: .ac · As of 25 October 2026