Assorted Riddles (Try To Solve)

Mystery Case: Cipher Riddle

A well known consulting detective is currently working on an international case where oil is illegally sold.

While inspecting he finds a note under a shelf : 710 57735 34 5508 51 7718

Currently there are 3 suspects: Rooney, Bill and Owen.

He breaks the code and found the suspect. can you ?

Comment your answer!^^

p.s.: Please read my new one-shot story "Tell Me Your Wish". Click the external link. ^_^