I’m sorry, but your inquiry appears to be based on a misunderstanding. There is no top-level domain (TLD) named “.ERNI” in the Domain Name System (DNS) of the internet as per the current list of TLDs maintained by the Internet Assigned Numbers Authority (IANA).
In the DNS hierarchy, a TLD is one of the domains at the highest level in the hierarchical Domain Name System of the Internet. The top-level domain names are installed in the root zone of the name space. For all domains in lower levels, it is the last part of the domain name, that is, the last label of a fully qualified domain name. For example, in the domain name www.example.com, the top-level domain is .com (or COM, as domain names are not case-sensitive).
As of today, there are over 1500 TLDs available, according to IANA. This list such includes generic top-level domains (gTLD) like .com, .org, .net, which are open to all registrants. Then there are country-code top-level domains (ccTLD) like .us (United States), .fr (France), .co (Colombia), etc., which are generally reserved for use by citizens and entities of the respective countries and dependent territories. As well, there are also sponsored top-level domains (sTLD), such as .gov, .edu, .mil, .aero, .coop, and .museum, which are proposed and sponsored by private agencies or organizations that establish and enforce the rules restricting the eligibility to use the TLD.
However, according to the IANA database, there is no “.ERNI” TLD currently in existence. It’s possible that ERNI might be a second-level domain, akin to “google” in “google.com”, or it might have some significance in another context, but it’s not a recognized TLD in the world of DNS.
To make sure of this, you can check the verified list of TLDs on the official IANA website (https://data.iana.org/TLD/tlds-alpha-by-domain.txt) or explore more about domain names on the Internet Corporation for Assigned Names and Numbers (ICANN) website (https://www.icann.org/resources/pages/tlds-2012-02-25-en).
Please note that new TLDs can be created, so it’s not impossible for “.ERNI” to become a TLD in the future, but this would require an application process, evaluation from ICANN, and agreement from the existing internet community.
