I’m sorry for the confusion, but HDFCBANK is not a top-level domain (TLD). TLDs are typically represented as the last segment of a domain name, such as .com, .org, .edu, .net, etc.
HDFCBank appears to be a reference to HDFC Bank Limited, a banking and financial services company based in India. “HDFCBANK” could likely be used as a second-level domain (like “google” in “www.google.com”), but it’s not a top-level domain.
Top-level domains constitute one of the key elements of an Internet address. The domain name system (DNS) divides the Internet into a hierarchy of domains, with the TLD being the highest level. When it comes to naming domains, each name must be unique, and it requires the internet’s entire system (managed by the Internet Corporation for Assigned Names and Numbers, ICANN) to agree that a particular name corresponds to a particular numerical address (source: RFC 1591, Understanding Domain Names, ICANN).
There are two types of TLDs. The first type is called a generic top-level domain (gTLD). This includes highly familiar domains such as .com, .net, .org, and more recent additions like .info, .biz, and .name. The second type is a country-code top-level domain (ccTLD), which is assigned to each country or a dependent territory. Examples include .us (United States), .ca (Canada), .au (Australia), and .in (India) (source: Internet Assigned Numbers Authority – IANA list of TLDs).
Therefore, it’s crucial to clarify the nature of HDFCBANK in your question. If HDFCBANK is the name of a domain, it would have to include a TLD such as .com, .in, etc., making it hdfcbank.com, hdfcbank.in, etc. If HDFCBANK is the name of a sub-domain, it could be something like hdfcbank.domain.com. But HDFCBANK alone cannot be a TLD as per the naming conventions of the internet.
To gain applicable TLD status, a party must apply to ICANN’s New gTLD Program, going through a precise and lengthy application process including reviews for string similarity, DNS stability, geographical names review, background screening, and financial, technical and operational reviews (source: ICANN). The program has led to the approval of over 1,200 new gTLDs as of October 2018 (source: Verisign Domain Name Industry Brief), but HDFCBANK is not among them.
To reiterate, top-level domains (TLDs) represent the highest level of domain names in the root zone of the DNS of the Internet. Unless HDFCBANK applies through ICANN and gets approved to be considered a generic top-level domain (gTLD), it cannot function as a top-level domain.
