Federal register number codes

Information about register numbers assigned by the United States Marshals Service and the Federal Bureau of Prisons.
Inmates and defendants get assigned a register number by the United States Marshals Service or the Federal Bureau of Prisons. Register numbers are in the following format:
xxxxx-yzz
The first 5 digits are pseudo-randomly assigned (typically if people are assigned numbers on the same day, they will get sequential numbers). Most likely, the district court assigning the numbers has a pre-defined block of numbers they use for that day.
The 3 digit register number suffix tells you the district court that originally processed the defendant into the system.
Once all 5 prefix digits have been used up, the district-based suffix will roll forward by 100. For example, if register numbers 00000-001 through 99999-001 are taken, then they start being assigned as xxxxx-101. The current numbering system allows each district to process in a total of 1,000,000 people.
Register number suffix District
x01 Northern District of Alabama
x02 Middle District of Alabama
x03 Southern District of Alabama
x04 Southern District of Florida
x05 District of the Northern Mariana Islands
x06 District of Alaska
x07 District of Columbia
x08 District of Arizona
x09 Eastern District of Arkansas
x10 Western District of Arkansas
x11 Northern District of California
x12 Central District of California
x13 District of Colorado
x14 District of Connecticut
x15 District of Delaware
x16 District of Columbia
x17 Northern District of Florida
x18 Middle District of Florida
x19 Northern District of Georgia
x20 Middle District of Georgia
x21 Southern District of Georgia
x22 District of Hawaii
x23 District of Idaho
x24 Northern District of Illinois
x25 Southern District of Illinois
x26 Central District of Illinois
x27 Northern District of Indiana
x28 Southern District of Indiana
x29 Northern District of Iowa
x30 Southern District of Iowa
x31 District of Kansas
x32 Eastern District of Kentucky
x33 Western District of Kentucky
x34 Eastern District of Louisiana
x35 Western District of Louisiana
x36 District of Maine
x37 District of Maryland
x38 District of Massachusetts
x39 Eastern District of Michigan
x40 Western District of Michigan
x41 District of Minnesota
x42 Northern District of Mississippi
x43 Southern District of Mississippi
x44 Eastern District of Missouri
x45 Western District of Missouri
x46 District of Montana
x47 District of Nebraska
x48 District of Nevada
x49 District of New Hampshire
x50 District of New Jersey
x51 District of New Mexico
x52 Northern District of New York
x53 Eastern District of New York
x54 Southern District of New York
x55 Western District of New York
x56 Eastern District of North Carolina
x57 Middle District of North Carolina
x58 Western District of North Carolina
x59 District of North Dakota
x60 Northern District of Ohio
x61 Southern District of Ohio
x62 Northern District of Oklahoma
x63 Eastern District of Oklahoma
x64 Western District of Oklahoma
x65 District of Oregon
x66 Eastern District of Pennsylvania
x67 Middle District of Pennsylvania
x68 Western District of Pennsylvania
x69 District of Puerto Rico
x70 District of Rhode Island
x71 District of South Carolina
x73 District of South Dakota
x74 Eastern District of Tennessee
x75 Middle District of Tennessee
x76 Western District of Tennessee
x77 Northern District of Texas
x78 Eastern District of Texas
x79 Southern District of Texas
x80 Western District of Texas
x81 District of Utah
x82 District of Vermont
x83 Eastern District of Virginia
x84 Western District of Virginia
x85 Eastern District of Washington
x86 Western District of Washington
x87 Northern District of West Virginia
x88 Southern District of West Virginia
x89 Eastern District of Wisconsin
x90 Western District of Wisconsin
x91 District of Wyoming
x93 District of Guam
x94 District of the Virgin Islands
x95 Middle District of Louisiana
x97 Eastern District of California
x98 Southern District of California
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