How do you an alien registration number if you have an H4 Visa?

As a H4 visa holder, you do not have an alien registration number, if you have not aplied Green Card (USCIS form I-485) before. To get an alien registration number, the H1 visa holder must apply for USCIS form I-140 first. If an Immigration visa is vailable for the H1 visa holder, he/she and the H4 depentent can apply for USCIS form I-485, and then get an alien registration number from SUCIS Servicd center. H-4 visas are issued to the H-1 holder's spouse and children under twenty-one years of age. Holders of H-4 visas are considered to be dependents of H-1B visa holders. As H-4 status holders, spouses and children under twenty-one years of age may be entitled to enter and remain in the United States for the duration of the H-1 holder's authorized stay.