People can call 311 in New York City for information on the status of passengers or "212-New-York" (212-639-9675). If using a TTY or Text Telephone, call 212-504-4115.
The derailment left 4 people dead and 63 others injured, 11 of them critically.
The injured have been taken to New York-Presbyterian, Montefiore, Jacobi and St. Barnabus Hospitals.
New York-Presbyterian says those seeking the condition of family members on the train can call 212-639-9675.