I am a stident with F1 visa How can I get alien registeration number?

I am a graduate student with F1 visa and authorized to work full time.How can I get alien registeration number?|||I believe Alien number is for legal immigrants and not students. you can read more about it at www.uscis.gov|||If you have the visa then you already have one. Look at any of the paperwork USCIS has sent you and it will have an "A-xxxxx" number on it somewhere in the top right hand side. As does your residency card. And your Social Security notification.|||The same way anyone does. Apply to INS for a "green card." There are grass roots organizations in every neighborhood in America to help you. Good luck.|||You can't get an alien registration number because you aren't an immigrant. You're here temporarily.|||i think that the A # is assigned to legal immigrants, you are a nonimmigrant.|||File for an adjustment of status at your local immigration office.