I was surprised to see no other posts on this number. Caller i.d. says USA Surveys and area code is from Bexar, Texas, outside of San Antonio.  I was called at 4 AM in the morning!  It was a hangup.  I have received other calls from USA Surveys but ignored them.

I also got a call at 4 a.m. .... didn' t answer as I didn't recognize the #,,,,, but made me mad that it woke me up!