Service number

A Service Number is a numerical designation given to each member of the UNSC military as a means of identification. Service numbers usually follow a ten-digit format followed by two letters that are sometimes the first and last initials of a person. There appear to be different schemes for different people, so it is possible that there is a different service number format for UNSC Officers, enlisted men, and warrant officers.

Note that the service numbers of members of ONI and the Spartans are classified for security purposes.

Known Service Numbers

• Admiral Roland Freemont: 00745-16778-HS
• Admiral Micheal Stanforth: 00834-19223-HS
• Captain Jacob Keyes: 01928-19912-JK<ref name="lmf">
• First Lieutenant Rick Hale: 876-544-321*
• Tech Officer Third Class Sam Marcus: 18827-318209-M

NOTE: Lieutenant Rick Hale referrs to his number as a "serial number." It is possible that there is a difference between these, but this is the only time the term "serial number" was used.