The United States Marshals Service assigns a distinct register number to each federal prisoner. This eight-digit number is used by the Federal Bureau of Prisons for accountability and tracking purposes.

These inmate register numbers are important for those with loved ones in federal custody because they must be used when sending money or mail to their incarcerated loved ones.

These eight-digit codes follow this format: XXXXX-0XX.

While the first five numbers in the register number are unique to each individual inmate, the last three numbers indicate the district where the offender was arrested and/or processed into the federal correctional system.

Below are the different codes for the various USMS district locations.

If you aren't sure what a particular federal inmate's register number is, you can always find it on the Federal Bureau of Prisons' website. Please use our Inmate Locator Tool to learn more about the online federal prisoner locator tool.

 

Federal Inmate Number Codes

Federal Inmate Register Code Numbers

001 - Northern District of Alabama (N/AL)

002 - Middle District of Alabama (M/AL)

003 - Southern District of Alabama (S/AL)

004 - Southern District of Florida (S/FL)

005 - District of the Northern Mariana Islands (D/MP)

006 - District of Alaska (D/AK)

007 - District of Columbia (Superior Court)

008 - District of Arizona (D/AZ)

009 - Eastern District of Arkansas (E/AR)

010 - Western District of Arkansas (W/AR)

011 - Northern District of California (N/CA)

012 - Central District of California (C/CA)

013 - District of Colorado (D/CO)

014 - District of Connecticut (D/CT)

015 - District of Delaware (D/DE)

016 - District of Columbia (DC/DC)

017 - Northern District of Florida (N/FL)

018 - Middle District of Florida (M/FL)

019 - Northern District of Georgia (N/GA)

020 - Middle District of Georgia (M/GA)

021 - Southern District of Georgia (S/GA)

022 - District of Hawaii (D/HI)

023 - District of Idaho (D/ID)

024 - Northern District of Illinois (N/IL)

025 - Southern District of Illinois (S/IL)

026 - Central District of Illinois (C/IL)

027 - Northern District of Indiana (N/IN)

028 - Southern District of Indiana (S/IN)

029 - Northern District of Iowa (N/IA)

030 - Southern District of Iowa (S/IA)

031 - District of Kansas (D/KS)

032 - Eastern District of Kentucky (E/KY)

033 - Western District of Kentucky (W/KY)

034 - Eastern District of Louisiana (E/LA)

035 - Western District of Louisiana (W/LA)

036 - District of Maine (D/ME)

037 - District of Maryland (D/MD)

038 - District of Massachusetts (D/MA)

039 - Eastern District of Michigan (E/MI)

040 - Western District of Michigan (W/MI)

041 - District of Minnesota (D/MN)

042 - Northern District of Mississippi (D/MS)

043 - Southern District of Mississippi (D/MS)

044 - Eastern District of Missouri (E/MO)

045 - Western District of Missouri (W/MO)

046 - District of Montana (D/MT)

047 - District of Nebraska (D/NE)

048 - District of Nevada (D/NV)

049 - District of New Hampshire (D/NH)

050 - District of New Jersey (D/NJ)

051 - District of New Mexico (D/NM)

052 - Northern District of New York (N/NY)

053 - Eastern District of New York (E/NY)

054 - Southern District of New York (S/NY)

055 - Western District of New York (W/NY)

056 - Eastern District of North Carolina (E/NC)

057 - Middle District of North Carolina (M/NC)

058 - Western District of North Carolina (W/NC)

059 - District of North Dakota (D/ND)

060 - Northern District of Ohio (N/OH)

061 - Southern District of Ohio (S/OH)

062 - Northern District of Oklahoma (N/OK)

063 - Eastern District of Oklahoma (E/OK)

064 - Western District of Oklahoma (W/OK)

065 - District of Oregon (D/OR)

066 - Eastern District of Pennsylvania (E/PA)

067 - Middle District of Pennsylvania (M/PA)

068 - Western District of Pennsylvania (W/PA)

069 - District of Puerto Rico (D/PR)

070 - District of Rhode Island (D/RI)

071 - District of South Carolina (D/SC)

073 - District of South Dakota (D/SD)

074 - Eastern District of Tennessee (E/TN)

075 - Middle District of Tennessee (M/TN)

076 - Western District of Tennessee (W/TN)

077 - Northern District of Texas (N/TX)

078 - Eastern District of Texas (E/TX)

079 - Southern District of Texas (S/TX)

080 - Western District of Texas (W/TX)

081 - District of Utah (D/UT)

082 - District of Vermont (D/VT)

083 - Eastern District of Virginia (E/VA)

084 - Western District of Virginia (W/VA)

085 - Eastern District of Washington (E/WA)

086 - Western District of Washington (W/WA)

087 - Northern District of West Virginia (N/WV)

088 - Southern District of West Virginia (S/WV)

089 - Eastern District of Wisconsin (E/WI)

090 - Western District of Wisconsin (W/WI)

091 - District of Wyoming (D/WY)

093 - District of Guam (D/GU)

094 - District of the Virgin Islands (D/VI)

095 - Middle District of Louisiana (M/LA)

097 - Eastern District of California (E/CA)

098 - Southern District of California (S/CA)