I have received calls from this number many times. When I answer I always hear people in the back ground. They sounded like they work in a call center of some kind. After I said "Hello" several times, They hang up without giving any type of response.
Called several times a day. Try calling back, line busy. I answered once and caller asked for donations for Vietnam vets. Vietnam war ended 50 years ago. How many Vietnam vets are still alive. They are still using them to scam money.