I’m sorry, but currently there’s no TLD (Top-Level Domain) that is categorized as .VIKING. TLDs are the last segment of a domain name, the part that follows immediately after the “dot” symbol. They are mainly classified into two categories: generic TLDs (such as .com, .net, .edu, .org) and country-code TLDs (such as .uk, .fr, .us).
ICANN (Internet Corporation for Assigned Names and Numbers) is the organization responsible for coordinating these unique identifiers across the world. The list of available TLDs can be found on their official site (https://data.iana.org/TLD/tlds-alpha-by-domain.txt).
The process of creating a new TLD is complex and costly. Anyone can apply, but applications are typically submitted by companies and organizations. The application process includes many steps, including a review for DNS stability, a financial evaluation, and a registry services review.
As there is currently no TLD .VIKING, if a company like Viking Cruises wished to apply for a TLD, they would apply through ICANN’s New gTLD Program. There are several stages to the process, including a lengthy evaluation stage, during which ICANN assess the financial, technical, and operational competency of the applicant to run a registry.
For specific examples, in the past new TLDs such as .google, .apple, .amazon were all created by these respective companies after going through the application process.
Please note that the entire process can take anywhere between 9 to 20 months and it comes with a substantial application fee ($185,000 USD as of the last application round in 2012), not to mention the cost of maintaining the infrastructure necessary to run a domain registry.
To conclude, the .VIKING TLD does not presently exist. If a relevant organization wanted to create it, they would have to undergo the correct application process with ICANN.