Comprehensive information about all top-level domains (TLDs) including generic, country code, and brand-specific domains.
Showing 12 of 2000 TLDs ( 2000 total)
Citadel
The .citadel TLD is a brand-specific top-level domain operated by Citadel Domain LLC, designed to create a secure and exclusive online space for affiliated entities. It was introduced as part of ICANN's new gTLD program to reinforce brand control and digital identity.
Restricted to Citadel Domain LLC and authorized entities; not available for public registration.
The .citadel extension is a brand top-level domain in the Domain Name System (DNS). It is managed by Citadel Domain LLC. .citadel was introduced in 2016. There are currently 3 domains registered under this extension. DNSSEC adoption stands at 33.3%.
Registration pricing for .citadel is not publicly listed. Brand TLDs are typically restricted to the owning organization.
The .citadel domain was applied for in ICANN's New gTLD Program and delegated to Citadel Domain LLC on June 30, 2016. It was proposed as a dotBrand TLD to enable controlled use within corporate and affiliated networks, without public registration.
Brand TLDs like .citadel are part of ICANN's New gTLD Program launched in 2012, which expanded the domain namespace beyond traditional TLDs.
The .citadel TLD is commonly used for the following purposes:
3
33.3%
| Metric | Value |
|---|---|
| Extension | .citadel |
| Type | Brand TLD |
| Total Registrations | 3 |
| DNSSEC Adoption | 33.3% |
| Registration Price | Contact registrar |
| Renewal Price | Contact registrar |
| Registry Operator | Citadel Domain LLC |
| Introduced | 2016-06-30 |
| Restrictions | Restricted to Citadel Domain LLC and authorized entities; not available for public registration. |
Registration density analysis for .citadel domains by character length. Currently 1 domains are registered across all lengths.
Total Registered
1
Peak Saturation
0.01%
3-char names
DNSSEC Adoption
100.0%
Top Provider
—
| Length | Registered | % Full | Density |
|---|---|---|---|
| 3 chars | 1 | 0.01% |
Updated daily from zone file analysis. Alpha density = registered / 26^length.
Compare across all TLDs →Not available for public use; restricted to Citadel Domain LLC and qualified subsidiaries or partners
This is a brand TLD exclusively controlled by Citadel Domain LLC. It is not available for public registration.
DNSChkr maintains a comprehensive TLD directory covering all 1,900+ active top-level domains. The data on this page combines multiple authoritative sources to provide information not found in standard TLD listings.
Domain registration counts and density analysis are computed daily from TLD zone files, providing accurate registration statistics rather than estimates.
DNSSEC deployment percentages are measured by scanning actual DNS records across all registered domains in each TLD zone.
Registration, renewal, and transfer prices are checked hourly across multiple accredited registrars and compared automatically.
DNS provider distribution is calculated from nameserver records, showing which hosting providers serve the most domains in each TLD.
Use DNSChkr tools to inspect any .citadel domain: run a full DNS health check, check DNS propagation, look up WHOIS records, or verify email authentication.
Disclaimer: The information on this page is sourced from IANA, ICANN, and respective registry operator publications, then structured and formatted with the assistance of AI. While accuracy is a priority, details such as pricing, registration requirements, and policies may change. Always verify with the official registry or an accredited registrar before making registration decisions.