This number called and claimed to be my nephew and asked for money. Don't answer these calls they'll mak you send them money & you'll get robbed.

I also got a call in mexico from this number, pretending to be my cousing.

My mom receive a call saying it was her nephew asking for money and to be sent to Mexico...

The FTC warns about the family emergency scam here http://www.ftc.gov/bcp/edu/pubs/consumer/alerts/alt111.pdf 
Report to the Internet Crime Complaint Center http://www.ic3.gov/complaint/default.aspx , the Federal Communications Commission http://esupport.fcc.gov/complaints.htm , the Federal Trade Commission https://www.ftccomplaintassistant.gov/ and your state AG http://www.naag.org/current-attorneys-general.php as appropriate.