You will be surprised to know top level domains (TLDs) are encountered by us every time we surf the internet. Equally surprising is the fact that many people are unaware of what they mean (especially those not in the IT sector) and how useful they can be in figuring out the nature of the website (without even visiting it!).
But due to the strict control on TLDs their true nature can be found by just looking at the FULL address.
Now top level domain is the bit (in italics in the examples above) after the main website name (which is highlight/bold).
The Internet Assigned Numbers Authority classifies top level domains into three categories but here we will discuss only the two important ones which you are most likely to encounter on a daily basis:
1) Country-code top level domains (ccTLD): used by countries as top level domains. Used by country specific versions of various sites. For example Google UK has the following address:
www.google.co.uk where the ccTLD is
.uk similarly for Google India the address is www.google.co.in where the ccTLD is
.in. This shows that the site is particular to that country.
Why do you need to bother with country specific sites?An example to answer the above question: If you reside in UK and you go to Amazon.com (the US version of the site) it will not sell you many of the available products and ask you instead to go to Amazon.co.uk and purchase the product from that site. This is due to copyright and other legal restrictions. 2) Generic top level domains (gTLD): used by particular type of organisation. For example
.mil (as in military) is used by the US Armed forces for their websites (http://www.navy.mil/ - US Navy). Similarly
.com (as in commercial) is widely used by companies. The gTLD
.gov (as in government) is used by US goverment bodies (e.g. www.fbi.gov - The Federal Bureau of Investigation)
These are often combined with ccTLDs to give country and role specific sites. For example all UK government websites end with
.gov.uk and for Indian government websites it is
.gov.in (http://www.indianrail.gov.in - website of Indian Railways) or for country specific commercial sites such as Amazon
.co.uk (
.co is same as
.com both standing for commercial websites) and eBay
.co.in.
USING TLDs TIP 1:When looking for government/country related information (such as passport information, visa, tourist information etc.) concentrate on websites with addresses ending with
.gov.XX or
.gov (for USA) specific to that country. Therefore if you are looking for information on Australia start with sites having names ending with
.gov.au. Many commercial websites have an official sounding name such as in the ad highlighted by the red box in the image below.
The website name is
www.indianvisaheadoffice.co.ukWhat strikes a casual user is the main website name: indianvisaheadoffice which may be mistaken as a Government of India website especially if the user is in a hurry and doesn't read the ad carefully (which doesn't clarify that it is NOT affiliated with the Indian Government and that it is a commercial website!).
But the FULL ADDRESS gives it away! Looking at the TLD we see it is
.co.uk which means it is a COMMERCIAL (
.co) website specifically for the UK (
.uk)