Ok you are demanding for the Official website of IIT JEE mains so here I am giving you it

IIT JEE mains

Official website
jeemain.nic.in/webinfo/Public/Home.aspx

On the top of home page you will get the sections such :-

Home
Information Bulletin
Mock Test for Computer Based Examination
FAQ for Computer Based Examination
FAQ
Contact Us

On the left side of home page you will get the sections such :-

Current Events
Calculation Sheet and Copy of OMR Sheet
Admission Notice
Question Papers 2016
Question Paper 2015
Question Paper 2014
Information Bulletin
Download Admit Card JEE(Main)-2016



Contact address

JEE(Main) Unit Central Board of Secondary Education
Plot No. 149, Block - H,
Sector - 63, Noida – 201309
Distt- Gautam Budh Nagar (U.P.)