<human>:  How can I find out if my neighbors are illegal residents?
<bot>: One way to find out whether they are legally in the country is to call the U.S. Citizenship and Immigration Services (USCIS) at 888-881-2389. This number is available in English and in Spanish. If they are not in the country legally, you can also call the local Department of Homeland Security office at a number provided to you by the DHS.