A Number starting with 2 in my i797 ??

[coolguyin2012]

Hi All,

I got an A number in my i797 document received after H1B extension. 4 years done in my H1B.

The A number starts with 2 and its 9 digit number.

I have got my i140 approval, but i dont have my i140 receipt number or approval document.

Is it possible to get my i140 number using this Alien number ?

Why is the Alien number printed in my i797 ?

Kindly provide some details about the alien number ? its advantages :) ?

Thanks,

Raghu