Any Advice?

I have been searching for someone, thus far all the searches have resulted in bogus addresses. Telephone numbers (land lines) are registered to another party who has no knowledge of this subject. Four different cell numbers have had the service suspended. A trace using the social security number also returns the same bogus addresses and telephone numbers. I have not been able to find any alias associated with the social security number. The history only covers the past three years, no prior information seems to exist.

He has been missing since February although has made enough contact, letters mailed from random locations, to let people know he is safe. I do not know of any family members to contact and mutual friends have not heard or seen from him.

Any suggestions what avenue I can pursue next?

I appreciate your thoughts!