I received a call from this number and it appears to be a bogus number

THIS IS A NO ONE ON LINE CALL , SHORTLY AFTER GETTING THIS CALL I HAD ANOTHER CALL COME IN WITH ODD NUMBER THAT DID SAME THING  SO I KNOW BOTH ARE FROM SAME CALLER 670-02-5200 IT IS MISSING ONE NUMBER TO BE COMPLETE NOT SURE HOW IT EVEN GOT THROUGH THE PC AT THE CO, BUT CALLER  ID DID PICK IT UP    SO ?????  DO NOT KNOW YET WHO OR WERE IT IS FROM    ?????

I need to block this ph# and similarly ph# 1 are keep coming.