Currently, there doesn’t appear to be a top-level domain (TLD) registered as .NEC. Top-level domains are the highest level of domain names of the Internet. They are developed and controlled by the Internet Assigned Numbers Authority (IANA). IANA which is a department of the Internet Corporation for Assigned Names and Numbers (ICANN) maintains the official directory of TLDs.
The list of all IANA-recognized TLDs can be readily accessed via the IANA website. A quick search on this list does not return any results for a .NEC TLD. This means that currently, there doesn’t seem to be a TLD recognized with the .NEC extension.
The ICANN, a nonprofit organization responsible for coordinating the maintenance and procedures of several databases related to the namespaces and numerical spaces of the Internet, has the authority to grant new TLDs. This process is lengthy and costly, involving a comprehensive application where the applicant must demonstrate its plans for the proposed TLD and its ability to manage it. An application fee of $185,000 is also required per TLD request, with additional annual costs of around $25,000. This was the case when generic TLDs such as .google, .apple, .nike, and others became part of the internet vocabulary.
Taking an example of .GOOGLE, the gTLD was applied for in 2012 and approved by ICANN. Google uses this gTLD for web pages like about.google, teaching tools.google, and many more. Similarly, .APPLE was applied for by Apple Inc. and is being used for sites like experience.apple, privacy.apple. This demonstrates how companies can request and utilize their own TLDs.
NEC Corporation which is a Japanese multinational information technology company could apply for .NEC as a sponsored top-level domain (sTLD) if they wish to. However, as per the available information, NEC Corporation has not applied or received rights for .NEC TLD.
In summary, while a company theoretically could apply for a .NEC TLD, currently no such TLD exists in the official IANA directory.
I based this answer on the information from the official ICANN website and the IANA website which maintains the DNS Root Zone Database.
