someone called and there was no number

hello i hope i can find help here.... someone at 5:20am called me with a really disturbing message and there was no number where it came from.... i wanna know if there is a way i can find out who called me?
is there a website a can see a log of calls made for my number?

i hope someone can help thank you very much

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how many times are you going to post the same thing?

Does it seys UnKnown ? cuz sometimes ppl call from far countries and it dosent shows
so yah . it may just be a wrong number :P

all u have to do is push *67 and dial the number and ur number is blocked and u cant find out what it is