Who called from 2485199145

Called many times and did not leave message.

Answered phone but no one on other end,  Maybe some one checking to see what time some one answers.. Or If a man answers hang up.

Caller ID lists it as Doctor's Office. Called my home 14 times from Saturday morning to Sunday afternoon.

DO NOT answer numbers I do not know; this one calls OFTEN--3 calls this morning and it's now 9:07 a.m. They leave no message. Very annoying.

a number 248-519-9121 calls home, then when i answered, it just hanged up
how is this could be stop.