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 is no known exact format for Service Numbers, as some follow this format, while others do not. An example is the SN of Jerald Ander, who uses a previously unknown format of four numbers, followed by three numbers, followed by his initials and a further four number string. It appears that Service Numbers are used in conjunction with UNSCMID numbers, however, the Service Number use is far more widespread than UNSCMID numbers.

Colonial Military Administration servicemen were also assigned UNSC Service numbers. These numbers followed the standard ten digit format, though in every known case the two letters did not match the individual's initials.

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 Michael Stanforth: 00834-19223-HS
 * Admiral Preston Jeremiah Cole: 03956-26127-PC
 * Admiral Dale Kilkin: 007981-63882-GE
 * Vice Admiral Kopano N'Singile: 25088-67602-KN
 * Vice Admiral Alexander Reaves: 02864-95668-AR
 * Colonel Mitchell Lima: 00512-5991-IX
 * Captain Jacob Keyes: 01928-19912-JK
 * Captain Maria Gilliam: 00622-7120-RJ
 * Lieutenant Commander Jack Hopper: 01283-94321-KQ
 * First Lieutenant Richard Lionel Barclay: 00045-23994-RL
 * Ensign W. Handford: 00786-31761-OM
 * Ensign Alexis Indara: 00801-46332-XT
 * Ensign Otto Seinmann: 00806-95321-PG
 * Sergeant Major Avery Johnson: 48789-20114-AJ
 * Gunnery Sergeant Edward Buck: 92458-37017-EB
 * Staff Sergeant K. Stark: 56327-91200-KS
 * Petty Officer Second Class L. P. Graves: 00773-04652-KK
 * Sergeant Thomas Chang: 01866-10032-TC
 * Sergeant Caio Zanato: 18221-50020-CZ
 * Tech Officer Third Class Sam Marcus: 18827-318209-M
 * Corporal Benjamín M. Nùñez: 71917-91990-BN
 * Corporal Robert Grove: 081225-78081-RG
 * Corporal James Dessen: 00578-48433-JD
 * Corporal Taylor Miles: 21175-12121-TM
 * Lance Corporal Kojo Agu: 14606-85099-KA
 * Private First Class Michael Crespo: 51033-15973-MC
 * The Rookie: 11282-31220-JD
 * Ian Callahan: 10056-00245-IC
 * Thomas P. Porter: 19190-54121-TP
 * Jackson Law: 10082—00055-JL
 * Sian Wong: 64040-11144-SW
 * Russel Tinnier: 10032-00154-RT
 * Thomas C. Meyer: 10072-00026-TM
 * Emmanuel Lomax: 66200-16524-EL
 * Jerald Ander: 9805-684-JMA4784
 * E.N.: 03529-24450-EN