You can uses one of the following ways to view WWNs:

• HBAnyware/OneCommand utility ( Emulex HBA only)
• SANsurfer utility (Qlogic HBA only)
• SAN switch's name server output

If none of the above mentioned tools are accessible you can try Fibre Channel Information Tool utility FCINFO.EXE available for download from Microsoft Download web site.
Link to Download: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=17530
1. Download to any drive and Install the application
2. Once the application has been installed open command prompt and enter "fcinfo" . Now you will get the WWN number for the HBA card.
Output:
  com.emulex-LPe1105-M4-0:      PortWWN: 20:01:00:21:9b:cb:6a:ab    \\.\Scsi0:
  com.emulex-LPe1105-M4-1:      PortWWN: 20:02:00:21:9b:cb:6a:ab    \\.\Scsi1: