.ac TLD information
Registry, RDAP server, WHOIS server, DNSSEC and IDN support for .ac.
Overview
- TLD
- .ac
- Type
- ccTLD
- IDN TLD
- Not supported
- Registry
- Internet Computer Bureau Limited
- Country
- Ascension Island
- Registration start date
- 1997-12-19
- DNSSEC
- Enabled
- RDAP server
- —
- WHOIS server
- whois.nic.ac
General registration information
Eligibility
- Registration category
- Open registration
- Individual registration
- Supported
- Organization registration
- Supported
- Local address requirement
- No restriction
- Local entity/agent requirement
- No
- Trademark requirement
- No
Length & IDN support
- Allowed length (ASCII letters, digits and hyphens)
- Unknown
- IDN registration
- Unknown
- Allowed length (IDN)
- Unknown
Second-level registration categories
Unknown
.ac domain power ranking
| Rank | Change | Domain | Power Rank | Referring Domains |
|---|---|---|---|---|
| 1 | － | method.ac | 59.2 | 1,362 |
| 2 | ▲ 1 | ctt.ac | 58.6 | 2,185 |
| 3 | ▼ 1 | disco.ac | 58.4 | 2,597 |
| 4 | ▲ 1 | google.ac | 58.3 | 11,279 |
| 5 | ▼ 1 | nic.ac | 57.6 | 220 |
| 6 | － | pdf.ac | 55.9 | 1,900 |
| 7 | － | telescope.ac | 53.8 | 7,214 |
| 8 | － | easy.ac | 50.7 | 251 |
| 9 | ▲ 3 | icont.ac | 49.6 | 380 |
| 10 | ▼ 1 | isc.ac | 49.4 | 920 |
Related TLDs
Frequently asked questions
- What is the difference between a gTLD and a ccTLD?
- gTLDs are generic top-level domains, while ccTLDs are assigned to countries or territories. Eligibility rules differ per TLD.
- What does DNSSEC support mean?
- It means the TLD supports DNSSEC signing. Whether it is actually enabled depends on each domain's configuration.
- Is this information up to date?
- TLD and registry information is sourced from public data such as IANA. Eligibility rules can change, so please also check each registry's official information for the latest details.