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What is a Sub Domain name?

A Sub-domain is a free domain name (web address) that is created by adding (appending) a specific alphanumeric character in front of a domain name. For example if your domain name is www.comblog.net, you can create a free sub-domain name from your domain name by adding (associating) a specific sub-name (prefix) in front of comblog.net e.g. blogger.comblog.net. The unique prefix “blogger” that was added infront of the comblog.net domain name is a sub-name and the web address “blogger.comblog.net” is a sub domain web address. The web address is called a sub-domain name because it was created from (out of the) the main domain name “comblog.net”.

It should be noted that even though a sub-domain name is created from a main domain name, it is a completely independent domain name (web address) that is capable of taking internet users to a completely different web site. Simply put,

Sub-domain web addresses can act as an entirely different web address (domain name). For example after creating the sub-domain name blogger.comblog.net, i can decide to create another website or blog with that sub-domain name. So after registering a domain name (yourdomainname.com), you can create so many sub-domain names (sub-web addresses) from your main domain name and use the sub-domains to set up many different kinds of websites. So you don’t need to register a new domain name whenever you want to create a new website. After I registered my domain name comblog.net, I have created sub-domain names like domainnamebook.comblog.net, howtostartablog.comblog.net and many other sub domains from my main domain name. If you type the above sub-domains in your browser, you will be taken to different web sites with contents not related to the content found on the COMBLOG.NET website.
Nowadays, almost every web master makes use of a sub-domain names. For example, the sub-domain “maps.google.com” is a sub-domain of google.com that takes you directly to the Google Maps website (a website with content that differs from that found at google.com). Sub-domain names are also popularly used to create the translated version of a web site. For example if you visit most websites, you will see a country flag icon that you can click if you wish to translate the content of the website. If you click on the French flag icon, you will be redirected to a sub-domain like “fr.godaddy.com” (the French version of the website) or en.godaddy.com (the French version of the site).

Like I mentioned earlier, Sub-domain names are free domain names i.e. after creating a sub-domain name, you won’t be expected to pay any renewal fee for the sub-domain name. Even if you create a million sub-domain names from your main domain name, it won’t cost you anything. However your sub-domain names will only be active (valid) as long as the main (host) domain name is active. For example if you fail to pay the annual renewal fee for your main domain name and as a result of that, your main domain name expires, all the sub-domain name that were created from (out of) the main (host) domain name will also expire simultaneously. Sub-domain names are just like parasites and the main domain name the host. For example if comblog.net expires, all its sub-domains will also expire simultaneously.
How to create a sub-domain name (a sub web address).
After you have registered a domain name and rented a hosting space for your website from a web hosting company, your web hosting company will give you the opportunity to create sub-domains from your main domain name. It’s very easy to create a sub-domain name. In fact if you already have a free blogger.com or wordpress.com blog, then you already know how to create a sub-domain name. To create a sub domain name in any of the web hosting company, you just need to select the main (host) domain name and enter the name that will be added (prefixed) to the front of the main domain name to create the sub-domain web address.
I’m going to show you how to create a sub-domain name at Hostgator. Hostgator is currently the most popular web host.
To create a sub-domain name at Hostgator, just simply log in to your control panel and ………
How to create a free website
How to create a Sub-Domain name without a Domain name.
Nowadays, even without a domain, you can still create a free sub-domain name. There are lots of websites that will allow you to create a free sub-domain name from their own domain name. Popular websites like blogger.com, wordpress.com and comblog.net will allow you to create a free sub-domain name. Blogger.com will allow you to create a sub-domain name like yoursubname.blogspot.com. My domain name domainnamebook.blogspot.com is a free sub-domain name I created at blogger.com. Any sub-domain you create at wordpress.com will be in this format “yoursubname.wordpress.com”. The free sub-domains are often offered coupled with free and compulsory webhosting. Many Sub-domain providers will also offer you free web design templates that will enable you to create a website with just a click of a mouse. However websites created from a free sub-domain name (created from a domain name that isn’t yours) has restrictions. Most sub-domain name providers have guidelines that stipulate the type of content that you are allowed to publish on your free website. Some free sub-domain name providers can shut your site down if they don’t approve of your content. Your sub-domain name provider will often display ads on your website. Many will clutter up your site with trashy ads ( I mean ads that are irrelevant to your web content). It’s also important to take note that most of this free sub-domain providers can disappear overnight if the service goes bust or gets taken over. Most of the free sub-domain providers offer little or no technical support when you really need it.
Of all the sub-domain (free website) providers, blogger.com and wordpress.com are the best (the most reputable) free website providers. Blogger.com is owned and run by Google. I have created lots of blogs at blogger.com. Due to the fact that wordpress.com and blogger.com are the best and also the most popular sub-domain and free website providers, I’m going to show you how to create a free website at Blogger.com and wordpress.com.