You will get your enrollment number by following this:

Open up IGNOU official website:http://www.ignou.ac.in

Then click on the 'student support' link provided in the menu bar at the top.

When you click on student support link,the sub menu will open up and you will find 'student zone' link there.please click on it.

Now a web page will open up where you will find lot of links and content.you have to find the 'Admission' link and click on it.

After clicking on Admission link,a new page will open up again.Here you will see number of different links.

You have to click on link with anchor text 'Get Confirmation on Your Registration By Name'

A new page will open up where you have to enter your name and date of birth, select program and regional centre.after entering all these mandatory details, please click on submit button.

Afte clicking on submit button,you will see all your IGNOU admission related details which also includes your enrollment number as well.