I checked the Boeing SEL site and I can see that their number range is 1-2066628895 - 1-2066628897 . Can you please advise which number the user is using to call to this Korean Number. Please confirm with the user if he is using our Polycom331 to call to this Korean number, If yes then which of the three mentioned above numbers is he using to call the Korean destination number (82 2 26691974) mentioned in the incident