To Apply for PAN Online go through the following:
You can apply for PAN either through NSDL or UTITSL
To apply on line for PAN through NSDL:
http://tin.tin.nsdl.com/pan/index.html
To know Status of PAN applied through NSDL https://tin.tin.nsdl.com/tan/StatusTrack.html
To apply on line for PAN through UTITSL:
http://www.utitsl.co.in/utitsl/uti/newapp/newpanapplication.jsp
To know Status of PAN applied through UTITSL
http://www.myutiitsl.com/PANONLINE/panTracker.do
To know more about PAN Legal Framework visit
source: http://www.incometaxindia.gov.in/archive/About%20PAN_06302010.pdf