Anyone can call your number, without knowing who the number is assigned to, and let it ring just one time. Some scammers and stupid telemarketers program their autodialers to call every possible number in an area code and exchange.
Other
32
Jan 8, 2016
calls all the time never leaves a message
Other
33
Jan 19, 2016
347-704-6555. Got this unsolicited call. Don't trust it and don't return call.