Internet Technology Explained

What URL Domain Extensions Stand For and Why They Are Needed

Gavin Phillips 31-07-2017

Before 1983, visiting a host on a network required typing in its IP address. The fledgling internet was much smaller, and reaching individual sites was only possible if you knew where to look. Fortunately, the Internet Engineering Task Force introduced their pioneering Domain Name System 5 Nifty Ways to Use DNS to Your Advantage One of the most underappreciated parts of the internet is the Domain Name System. DNS is often referred to as the phonebook of the internet, but it is far more than just a lookup service. Read More (DNS), allowing numerical IP addresses to be identified as specific domain names.


Instead of having to remember a long sequence of numbers, like, you only have to remember a URL:

Along with the new DNS, domain extensions appeared. A domain extension is the top-level part of the domain name (TLD), such as .com, or .net. A majority of sites use .com, making it easy to forget that at their inception, each domain extension had a specific intended purpose. Well, that rings true today, even though the lines have been somewhat blurred. That said, there are a significant number of TLDs used for their specific purpose — and that alone.

Let’s take a short walk through the history of domain extensions, and look at where we are today.

History of Domain Extensions

In 1984, the Internet Assigned Numbers Authority (IANA) established the first six domain extensions: .com, .edu, .gov, .mil, .org, and .net. Shortly after, the first two-character country code domain extensions (like .uk and .us) were established. In 1988, .int was also introduced.

What URL Domain Extensions Stand For and Why They Are Needed common tlds
Image Credit: Bart Sadowski via


After that, the internet exploded into life (not as a direct result of the TLDs, I must add, but it certainly made browsing the internet much easier). But it wasn’t until after the Internet Corporation for Assigned Names and Numbers (ICANN) was created in 1998 that any new domain extensions (besides country code extensions) came into use.

At the time, ICANN had an agreement with the United States Department of Commerce to operate IANA. However, a number of countries asserted that dominance over those organizations essentially established the U.S. as the de facto “leaders” of the internet. Moreover, the U.S. authorities actually agreed and, on October 1st 2016, transferred power of ICANN to a multi-stakeholder community comprising of member nations.

Types of Domain Extensions

For a long time, there were only the aforementioned Generic Top Level Domains (gTLDs). A gTLD is now considered anything unsponsored e.g. is not limited by geography, industry, country designation, etc.

In 2000, a selection of seven new TLDs became available: .aero, .biz, .coop, .info, .museum, .name, and .pro.


ICANN added further TLDs throughout 2005, up to 2007, including .cat, .jobs, .mobi, .tel, .travel, and .asia. This batch were sponsored TLDs, serving a specific community, whether that be geographic, ethnic, professional, technical, or other.

In 2008, the adherence to the existing TLD system began to change. ICANN initiated a new TLD naming process that aimed to take “a significant step forward on the introduction of new generic top-level domains.”

This momentous development fundamentally changed the TLD system. Previously, there were only 22 gTLDs available, and domains registered had to use Latin characters (or over 280 including two-letter country codes). Suddenly, it became possible for anyone with enough money to apply for a gTLD. Furthermore, non-Latin characters, such as Cyrillic, Arabic, and Chinese How To Spot A Chinese Domain Name Scam Chinese domain name scams have become popular and successful. Don't let them rip you off. We will explain exactly what these scams are, but first it's more important to understand what started them. Read More , could feature as gTLDs.

Where previously a gTLD was almost exclusively defined by one organization, businesses could create an arbitrary gTLD matching their company branding. The ICANN Statutory Application Fee for a gTLD currently stands at $185,000. (This is before paying an annual global registration fee — you have to pay for your blog hosting ever year, and this is no different.)


New Application Period

But before you and Dave from the pub get any ideas, not just anyone can start a gTLD. It must come from an established organization or company, and the process takes a minimum of nine months, and that is without hitting any snags on the way. If yours and Dave’s application gets pushed to an extended evaluation requiring arbitration from the Registry Services Technical Evaluation Panel, you’d better ask Steve if he’s got an extra $50,000 laying around, because it is immediately added to your receipt. That vanity URL is really going to set you back 5 Tips for Finding Personal Domain Name Ideas You Can Be Proud Of Getting a domain name you want is getting difficult. Use these tips to brainstorm a creative domain name that's available. Read More

Of course, $185,000 isn’t that much, especially for major corporations. ICANN opened their newly devised gTLD application system in 2012, receiving over 1,900 applications — over 750 of which were contested between two or more parties. And, as you’d expect, big companies took the chance to ensure brand protection. For instance, Microsoft applied for:

  • BING
  • DOCS
  • LIVE
  • XBOX

And while Apple applied for only one (.apple), Amazon and Google applied for 76 and 101 gTLDs, respectively.

Remember the $185,000 cost for a gTLD? That is if there are no contentions, and your application process is the smoothest. Amazon ended up forking out over $4.5 million for the .buy gTLD ICANN public auction. Google splashed a cool $25,000,001 on the .app gTLD at the same auction.


Restricted or Unrestricted

All domain extensions are either restricted or unrestricted. A sponsored TLD is almost always restricted.

What URL Domain Extensions Stand For and Why They Are Needed tld cubes with www
Image Credit: Gts via

For example, only accredited educational institutions are eligible to register a domain with a .edu extension. Many country code domain extensions are also restricted and can only be registered by citizens or residents of the country that the extension refers to.

.aero, sponsored by private air transport communications company, SITA, limits registration to air transport companies.

Conversely, unrestricted domain extensions, like .com, .org, and .net, can be registered by anyone. There are also some unrestricted country code domain extensions, which has resulted in the registration of “domain hacks” that create a word using the domain extension., for example, uses the United States country code .us to form the word “delicious.”

Wikipedia keep an up-to-date List of Internet top-level domains.

Modern Domain Extensions

New domain extensions are constantly proposed and debated. As with most things in life, it really depends how much money is behind the debate team. Hence, we have .horse, .sucks, .webcam, and more. That said, we also have .xyz, and Google parent company Alphabet decided it was good enough for their site Google Chose .XYZ Over .Com for Alphabet. Is .Com Irrelevant? Alphabet, parent company of Google, is found at and not – is this the beginning of the end for .Com? Read More .

In addition, it may come as no surprise to learn that many new domain extensions become flooded with “bad domains,” pumping out spam mail and other nasties. Domain extension owners desperate to make a return on their investment knowingly allow the abuse of their domains, and we suffer the consequences.

What URL Domain Extensions Stand For and Why They Are Needed spamhaus top spamming gtlds

And, in reality, how often do you notice the domain extension you’re using, anyway?

Are there any domain extensions you really would like to see? Or do you think it is just a waste of time, and a shameless money-grab by ICANN? What would your domain extension be? Let us know your thoughts in the comments below!

Related topics: DNS, Domain Name.

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  1. Hope
    November 17, 2018 at 3:24 pm

    I do tend to look at domain extensions. I'm a web geek, but I like to think of different domain hacks. Not only that but when I'm spinning the web, I'll often think oh, that domain's cool! It might be cool because it has an interesting extension, or maybe the combination of the name and extension makes it seem fun to me. Like I said, I'm a web geek though lol. I'm also a wordsmith, so that makes for an interesting combination at times!

  2. Matt
    August 2, 2017 at 4:38 pm

    As a forum mod during the first wave of extra domains, found that ".biz" pretty much warranted instabanning.

    PS. And "" keep advertising Booking .yeah - well if they pony up the cash, they could actually have it for real.

    • Gavin Phillips
      August 2, 2017 at 5:45 pm

      Aye, some domains just lent themselves to spam. I guess desperation to make money back...or just unscrupulous enterprises lobbying for their own domain in the first place?

      I can see a .yeah domain being pretty heavily abused.

  3. ReadandShare
    August 1, 2017 at 11:50 pm

    99% of the sites I visit end in .com. The other 1% are .net, .org and .gov. I've never encountered or visited anything else. Are they essentially "academic" for all intent and purpose??

    • Gavin Phillips
      August 2, 2017 at 3:13 pm

      I think noticing them depends on what you're doing. When I was student, I visited loads of .edu specific sites. And, as the article says, some sites use the new TLDs to create interesting domains. The ".ly" is very popular. Furthermore, some of the sites using new TLDs probably aren't on your radar. The web is really quite vast. I host a site for some friends using the ".xyz" but you'd never stumble across it. And, most of the most popular sites, your news, social media, sports, gaming, etc, are long established, and have held .com,, etc, for a very long time.

  4. Kit
    January 12, 2016 at 10:04 pm

    Needs to be updated to include .win extension. Not sure where that one is from but I have been seeing it a lot, especially in my spam folder.

    • Doc
      August 1, 2017 at 3:35 pm

      You really think that they're using real email addresses in the "from:" line in your spam folder?
      In all likelyhood, even the links showing in your spam emails are faked (and clicking it - which I hope you're *not* doing - will likely go somewhere other than what the link shows).

      • Kit
        August 1, 2017 at 8:50 pm

        If there is any question about an email, I always hover over the from line anyway. Even if it is my regular email folder. I'm one of those guys who mark suspicious emails 'spam' if I have any question. The '.win' extension seemed to be a fad that faded quickly.

    • Doc
      August 1, 2017 at 3:36 pm

      I wonder if Microsoft actually got the ".skydrive" TLD they applied for - they wound up having to rename to "OneDrive" anyway...

      • Gavin Phillips
        August 2, 2017 at 3:23 pm

        No. After the initial "OMG new TLDs LET'S GET BRANDING" the market settled down, and Microsoft ended up with just .microsoft (afaik). The .excel, .word, .skydrive aren't in use, that I can see.

  5. Aibek
    July 6, 2010 at 12:45 pm

    wow, had no idea about many of those specific extensions. nice read.

    • traver
      January 29, 2015 at 10:29 pm

      wow,now I can know......

  6. Tony
    July 6, 2010 at 1:57 am

    Very good post. I find this post more useful.