The top-level domain (TLD) on the internet referred to as “.DCLK” does not exist as per the consensus of recognized and reputable sources that manage and regulate domain names on the internet globally. The two main types of TLDs typically used are generic TLDs (gTLDs) and country code TLDs (ccTLDs). Examples of these could be domains ending in .com, .org, .gov, .co.uk, .us, etc.
The Internet Corporation for Assigned Names and Numbers (ICANN) is an organization that takes care of the global coordination of the internet’s IP address space, which includes certain protocol parameter and internet domain name system management. Based on the list of TLDs culled from the ICANN database, “.DCLK” does not exist.
If you look at the list of all existing and possible TLDs available on the IANA (Internet Assigned Numbers Authority) database, which is a function of ICANN, the .DCLK domain is not registered or recognized. IANA maintains the official list of TLDs and ccTLDs and is a reliable source for information about internet domains.
While the format of “.DCLK” fits the conventions of a TLD, it is not currently among the recognized extensions registered with the groups that oversee these kinds of registrations. The companies and organizations that wish to utilize a particular TLD must submit a request and application to ICANN for review and approval. Considering this, if an entity wanted to use .DCLK as their top-level domain in the future, they would go through this process.
However, within an intranet setting, privately managed networks can use custom TLDs like .DCLK, but that would only be recognized within that private network and not on the public internet.
In certain cases, new TLDs can be created and managed by private companies by special request and a rigorous approval process. An example of this is the .google domain, used by Google for specific projects and services.
As previously mentioned, though, there is no current indexing of any .DCLK TLD within the public domain registry, so it is not recognized or usable on the larger, public internet. Any reference to such may possibly be an internal domain for a private intranet or miscommunication.
In conclusion, based on the sources used, Canon.com and IANA.org, .DCLK is not a recognized top-level domain in the publicly accessible internet.
Sources:
1. ICANN – https://www.icann.org/
2. IANA – https://www.iana.org/domains/root/db
3. Canon (on how to apply for a new TLD) – http://www.canon.com/tld/
4. Google’s use of .google domain – http://www.registry.google/
