1-800-375-5283
Change of Address - for Applications or Petitions pending at a Service Center. If you have a pending application or petition at a service center, call the NCSC toll-free number at 1-800-375-5283 when you move to report your address change.29 Sep 2016
National Customer Service Center ' USCIS
https://www.uscis.gov/about-us/contact-us/national-customer-service-center
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