.citadel Brand TLD
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.
.citadel Domain Overview
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 Info
Registration pricing for .citadel is not publicly listed. Brand TLDs are typically restricted to the owning organization.
Security Features
- DNSSEC
What Is the History of .citadel?
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.
Did you know?
Brand TLDs like .citadel are part of ICANN's New gTLD Program launched in 2012, which expanded the domain namespace beyond traditional TLDs.
What Is .citadel Used For?
The .citadel TLD is commonly used for the following purposes:
Brand protection
Corporate intranet systems
Internal web services
Secure partner portals
How Many .citadel Domains Are Registered?
Total Registrations
3
DNSSEC Adoption
33.3%
How Does .citadel Compare?
| 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. |
How Available Are .citadel Domain Names?
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 →How Do I Register a .citadel Domain?
Eligibility
Not available for public use; restricted to Citadel Domain LLC and qualified subsidiaries or partners
Restricted TLD
This is a brand TLD exclusively controlled by Citadel Domain LLC. It is not available for public registration.
Registration Process
- Choose an accredited domain registrar that offers .citadel domains
- Check domain availability using the registrar's search tool
- Complete the registration process and provide required information
- Pay the registration fee (typically )
- Manage your domain settings through your registrar's control panel
Frequently Asked Questions
How Is This .citadel Data Compiled?
DNS Checker 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.
Zone File Analysis
Domain registration counts and density analysis are computed daily from TLD zone files, providing accurate registration statistics rather than estimates.
DNSSEC Adoption Tracking
DNSSEC deployment percentages are measured by scanning actual DNS records across all registered domains in each TLD zone.
Registrar Price Monitoring
Registration, renewal, and transfer prices are checked hourly across multiple accredited registrars and compared automatically.
Provider Market Share
DNS provider distribution is calculated from nameserver records, showing which hosting providers serve the most domains in each TLD.
Use DNS Checker 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.