Understanding the Different Types of Domain Names and Their Significance

Every time you type a web address into your browser, you are interacting with one of the most quietly powerful systems on the internet – the Domain Name System (DNS). At the heart of this system is the domain name itself, and more specifically, the extension at its end. Whether it is .com, .in, or even .भारत, that suffix is not arbitrary. It belongs to a carefully structured classification system that organises the entire internet. Understanding the different types of domain names is not merely a technical exercise – for law students and legal professionals, it is foundational knowledge in tracing how intellectual property disputes, cybersquatting cases, and jurisdictional questions arise in the digital space.

The domain name system: a quick overview 🔗

The internet runs on numerical addresses called IP addresses. Because remembering a string of numbers for every website is impractical, the DNS was developed to translate human-readable names – like supremecourt.nic.in – into the numerical addresses computers actually use. ICANN (Internet Corporation for Assigned Names and Numbers) is the international body responsible for coordinating and managing the DNS globally, while the Internet Assigned Numbers Authority (IANA), a division of ICANN, maintains the root zone database where all top-level domains are listed.

A domain name has a hierarchical structure. Take www.supremecourt.gov.in as an example. Reading from right to left: .in is the top-level domain, .gov is the second-level domain indicating a government entity, supremecourt is the specific domain name registered, and www is the subdomain. This hierarchy is the backbone of how websites are identified and organised online.

Top-level domains (TLDs): the foundation of classification 🔗

A top-level domain (TLD) is the last segment of a domain name – the part that comes after the final dot. It sits at the highest level of the DNS hierarchy. As of February 2026, the IANA root database includes 1,593 active TLDs, spanning a wide range of purposes, geographies, and communities. TLDs are broadly divided into two primary categories: generic top-level domains (gTLDs) and country code top-level domains (ccTLDs). Beyond these, there are also sponsored TLDs, infrastructure TLDs, and test TLDs, each serving a specific administrative purpose.

The original seven gTLDs 🔗

When the internet was still in its early years, the first seven generic TLDs were created in the 1980s: .com, .edu, .gov, .int, .mil, .net, and .org. Each had a designated purpose – .edu for educational institutions, .gov for government bodies (originally restricted to the US government), .mil for military use, and .org for non-profit organisations. Over time, however, the lines blurred significantly. The .com, .net, and .org domains became open to anyone, regardless of whether they were actually commercial entities, network providers, or organisations.

Generic top-level domains (gTLDs) 🔗

A generic top-level domain (gTLD) is any TLD that is not associated with a specific country or territory. The defining characteristic of a gTLD is that it is available to anyone anywhere in the world, with no geographic restriction. Each gTLD is managed by a Registry – an organisation responsible for operating and maintaining it – which works with ICANN and with registrars who sell the domains to the public.

Unrestricted and restricted gTLDs 🔗

Within gTLDs, there is an important distinction between unrestricted and restricted domains. Unrestricted gTLDs like .com, .net, and .info can be registered by anyone for any purpose. Restricted gTLDs, on the other hand, require proof of eligibility. For instance, .name is limited to individuals registering their personal names, and .pro was originally restricted to licensed professionals such as doctors and lawyers.

Sponsored top-level domains (sTLDs) 🔗

A sub-category worth noting is the sponsored top-level domain (sTLD). These are specialised TLDs where a designated sponsor organisation represents a specific community and sets policies for who can register within that TLD. Examples include .aero for the air transport industry, .coop for cooperative organisations, and .museum for accredited museums. The .edu and .gov TLDs are also now considered sponsored TLDs, governed by specific US-based authorities, even though they predate the formal sTLD concept.

The 2012 new gTLD expansion 🔗

For decades, the number of available gTLDs was extremely limited. That changed dramatically when ICANN launched the New gTLD Program in 2012, receiving 1,930 applications for new top-level domains. This program enabled organisations, businesses, and communities to apply for their own custom TLDs. The result was an explosion of new extensions – .bank, .app, .shop, .law, .guru, .pizza – totalling over 1,200 newly delegated gTLDs. ICANN is currently working on the next round of applications, which is projected to open in April 2026. This expansion has had significant implications for trademark law, as brand owners now face the challenge of protecting their marks across an ever-growing number of TLD spaces.

Country code top-level domains (ccTLDs) 🔗

A country code top-level domain (ccTLD) is a two-letter TLD assigned to a specific country or territory based on the ISO 3166-1 alpha-2 country codes. Each country gets its own unique two-letter suffix – .in for India, .uk for the United Kingdom, .us for the United States, .cn for China, and so on. The first ccTLDs were registered in 1985, beginning with .us and .uk. Today, ccTLDs account for approximately 40% of the total domain name industry, with around 153 million ccTLD registrations.

In India, the .in ccTLD is managed by the IN Registry under the National Internet Exchange of India (NIXI). For any legal dispute involving an Indian domain, the .in registry’s policies and dispute resolution procedures become directly relevant – making this knowledge practically indispensable for legal practitioners dealing with domain-related matters.

Open and closed ccTLDs 🔗

Not all ccTLDs operate under the same rules. Closed ccTLDs restrict registrations to those with a genuine connection to the country – citizenship, residency, or local corporate registration. Australia’s .au, Germany’s .de, and Canada’s .ca are prominent examples. Open ccTLDs, by contrast, allow anyone globally to register a domain under them. Some small nations have made their ccTLDs available worldwide, often for commercial use. Colombia’s .co is widely used as an alternative to .com, Tuvalu’s .tv is popular among video platforms, and the British Indian Ocean Territory’s .io has become a favourite of tech startups. These open ccTLDs raise interesting questions in trademark and intellectual property law, because a business in one country can freely use what appears to be another country’s domain.

Second-level domains (SLDs) and subdomains 🔗

Below the TLD in the DNS hierarchy sits the second-level domain (SLD) – the part of the domain name directly to the left of the TLD. In google.com, the word “google” is the SLD. It is at this level that most businesses and individuals register their unique web identity. Some countries also use a structured second-level namespace: in the UK, .co.uk signals a commercial entity, and in India, .co.in functions similarly. These second-level country-code structures help indicate the nature of the registrant within a national domain space, and are frequently at the centre of domain disputes and cybersquatting cases because they most directly represent the brand or name.

A subdomain sits to the left of the SLD and is used to organise content within a domain. For instance, mail.google.com uses “mail” as a subdomain of google.com. Subdomains are not separately registered – they are created and controlled by the domain owner. In legal contexts, subdomains can become relevant when a party attempts to use them to host infringing content or to mislead users.

Internationalized domain names (IDNs) and multilingual extensions 🔗

The internet was built on the ASCII character set – the basic Latin alphabet with 26 letters, digits, and a hyphen. For decades, this meant that anyone whose native script was not Latin – whether Arabic, Hindi, Chinese, or Cyrillic – was excluded from registering a domain in their own language. Internationalized Domain Names (IDNs) address this exclusion directly. An IDN is any domain name that includes characters from non-Latin scripts – such as Arabic, Chinese, or Devanagari. Because the DNS technically operates only on ASCII characters, IDNs use a system called Punycode to encode the non-Latin characters into an ASCII-compatible format before they enter the DNS.

IDN ccTLDs: India’s case 🔗

In October 2009, ICANN approved the IDN ccTLD Fast Track Process, which allowed sovereign nations to have their country code top-level domains represented in their native scripts. For India, this was significant. India has 22 official languages written in over a dozen scripts, making it one of the most linguistically complex ccTLD cases in the world. ICANN delegated the responsibility of managing Indian-language IDNs to NIXI, the same body that manages the .in registry. The Devanagari script ccTLD .भारत was officially launched on 27 August 2014, and it supports eight official languages written in Devanagari, including Hindi, Marathi, Maithili, and Sindhi. Other Indian language scripts – such as Tamil, Telugu, Gujarati, and Punjabi – have their own separate ccTLDs as well.

Other IDN ccTLDs from around the world include .рф for Russia, .中国 for China, and .شبكة – the Arabic word for “web”. These developments signal a fundamental shift in how the internet identifies itself: from an English-language, Latin-script network to a genuinely multilingual global platform.

IDN gTLDs: multilingual generic extensions 🔗

The 2012 ICANN New gTLD Program also introduced IDN gTLDs – generic top-level domains in non-Latin scripts. These included Chinese-script TLDs like 游戏 (meaning “games”), the Russian-script сайт (meaning “site”), and the Arabic-script شبكة (meaning “web/network”). As of February 2022, 92 IDN gTLDs and 61 IDN ccTLDs had been formally delegated. The practical significance of IDN gTLDs for law is considerable: brand protection strategies must now extend to non-Latin domain registrations, and questions of passing off or trademark infringement become more complex when the infringing domain is written in a different script.

Why this classification matters in law 🔗

The classification of domain names is not purely technical – it has concrete legal consequences. The type of TLD determines which dispute resolution mechanism applies. For generic TLDs, disputes are handled under ICANN’s Uniform Domain Name Dispute Resolution Policy (UDRP). For ccTLDs, each country administers its own dispute resolution framework. In India, the .in registry operates the .IN Dispute Resolution Policy (INDRP) for resolving disputes under the .in domain space. Understanding whether a disputed domain is a gTLD or a ccTLD – and which specific sub-type – is the first step in identifying the correct forum and applicable rules for any legal challenge. Additionally, the rise of new gTLDs and IDNs has expanded the surface area for cybersquatting and trademark infringement, making domain classification an increasingly relevant topic in intellectual property litigation.

What do you think? As India’s internet user base grows and regional-language domains like .भारत gain traction, how should Indian trademark law evolve to address disputes that arise entirely in non-Latin scripts? And with over 1,200 new gTLDs already in existence and another round expected in 2026, is the current domain dispute resolution framework still adequate for protecting brand owners?

References

1. https://www.icann.org/resources/pages/idn-2012-02-25-en
2. https://icannwiki.org/Generic_Top-level_Domain
3. https://en.wikipedia.org/wiki/Top-level_domain
4. https://www.icann.org/resources/pages/newgtlds-history-2023-04-05-en
5. https://opensrs.com/blog/what-are-gtlds-and-cctlds/
6. https://dig.watch/processes/new-gtld-program
7. https://newgtlds.icann.org/en/about/program
8. https://newgtldprogram.icann.org/en/application-rounds/round2
9. https://en.wikipedia.org/wiki/Country_code_top-level_domain
10. https://www.registry.in/internationalized-domain-names-idns
11. https://icannwiki.org/Internationalized_Domain_Name
12. https://www.swastikinfo.net/register-domain-in-hindi-language
13. https://dn.org/the-rise-of-idns-internationalized-domain-names-explained/