Immigrant visas to Israel are handled through the Jewish Agency only.
The phone number of the Aliyah Center in New York is 212-339-6063.
Aliyah enquiries can also be directed to the Nefesh B'Nefesh (NBN) organisation:
Phone: 1-866-425-4924
email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
website: www.nbn.org.il