How to Search for a Federal Inmate: Complete Guide

Someone you love just got taken. Maybe they were sentenced last week. Maybe the marshals scooped them up and now the phone's gone silent. You're sitting there refreshing a government website that tells you almost nothing, and your heart is pounding.

I've been on the other side of that website. I did 4.5 years in the Federal Bureau of Prisons — started at FCI Leavenworth on the medium side and worked my way down to a camp. My own family sat where you're sitting right now, confused and scared, trying to figure out where I was and what to do next.

So let me be straight with you. The official federal inmate locator works. But it's built by the government, for the government, and it will tell you the bare minimum. Nobody at the BOP is going to hold your hand. That's my job now.

This is the most complete guide on the internet for finding someone in federal prison — and more importantly, what to do the second you find them.

Quick disclaimer: BOP Release Tracker is not affiliated with the Federal Bureau of Prisons. We're a private tool built by people who've been through the system. We just make the government's mess easier to deal with.

The Fastest Way to Find a Federal Inmate

The official tool is the BOP Inmate Locator at bop.gov/inmateloc. It covers federal inmates from 1982 to today, and you do not need an account. You can also use our Federal Inmate Search tool, which presents the same public data in a simpler format and can monitor changes.

What You Need to Search

You can search by:

• Name: Legal first and last name, with race, age, and sex available to narrow results.
• BOP register number: Usually formatted as 12345-678.
• FBI number
• INS number
• DCDC number

If you have the register number, use it. Names can produce multiple matches; numbers usually identify one record.

Step-by-Step: Using the Official Locator

1. Open the BOP Inmate Locator.
2. Choose a search by number or name.
3. Enter the person’s full legal name, not a nickname.
4. Add identifying details if the name is common.
5. Submit the search.
6. Copy the register number, facility, status, and projected release date.
7. Save or screenshot the result because the BOP does not provide a convenient history of changes.

My mother searched my nickname for two days before someone told her to use my legal name. If a search fails, do not assume the worst. Work through the troubleshooting steps below.

What a Federal Register Number Means and Why Every Digit Matters

A BOP register number is the permanent identifier assigned to someone in federal custody. It normally appears as five digits, a dash, and three digits: 12345-058. It follows the person through transfers, custody-level changes, programs, halfway-house placement, and home confinement.

The first five digits are a sequential identifier originating with U.S. Marshals processing. They do not reveal sentence length, security level, or current facility. The three-digit suffix generally identifies the federal judicial district associated with processing. For example, commonly referenced codes include:

| Suffix | District | |---|---| | 001 | Northern District of Alabama | | 008 | District of Arizona | | 011 | Northern District of California | | 012 | Central District of California | | 024 | Northern District of Illinois | | 054 | Southern District of New York | | 077 | Northern District of Texas | | 079 | Southern District of Texas | | 097 | Eastern District of California | | 098 | Southern District of California |

In large districts, the middle suffix digit may roll from 0 to 1 after a numbering cycle. Treat district-code lists as reference information, not proof of the person’s current location.

You need the register number for searches, mail, money deposits, facility calls, visiting paperwork, and legal or records requests. Put it in your phone and write it exactly as shown. It does not change when the person transfers. A new number generally means a new period of custody after release and reentry.

At many institutions, the fifth digit before the dash may help determine odd/even visiting days, but this varies. Always confirm the facility’s current handbook.

Reading Facility Codes in the BOP Locator

Facility codes combine an institution type with a location abbreviation. Understanding the prefix gives you a quick sense of the person’s placement:

| Code | Meaning | General signal | |---|---|---| | USP | United States Penitentiary | High security | | FCI | Federal Correctional Institution | Usually medium or low security | | FPC | Federal Prison Camp | Minimum security | | FDC | Federal Detention Center | Pretrial, short-term, or court-related custody | | MDC | Metropolitan Detention Center | Urban detention and court-related custody | | MCC | Metropolitan Correctional Center | Urban, court-adjacent detention | | FMC | Federal Medical Center | Medical or mental-health referral | | CI | Correctional Institution | Often lower security | | RRM | Residential Reentry Management | Community supervision office | | RRC | Residential Reentry Center | Halfway-house placement | | CAMP | Satellite camp | Minimum-security unit attached to a larger facility |

For example, “FCI LEV” refers to a Federal Correctional Institution at Leavenworth, while “USP TERRE HAUTE” identifies a high-security penitentiary. Location abbreviations are not always obvious, so verify unfamiliar codes through the BOP facility directory.

A change from FCI to FPC may reflect a security-level reduction. A move to USP can indicate reclassification or discipline, but the code alone does not explain why. A move to FMC may involve medical treatment. RRM or RRC generally means the person is in the release pipeline, although the public locator may not display a halfway-house address.

The BOP makes designation decisions through its Designation and Sentence Computation Center in Grand Prairie, Texas. The sentencing court can recommend a facility, but the BOP makes the final designation.

What “In Transit” Means and How to Handle a Federal Transfer

“In Transit” means the person is physically moving between facilities, waiting at a transfer point, or being processed before arrival. It does not automatically mean discipline, danger, or a sentence extension. The BOP usually withholds the exact location during movement for security reasons.

Transfers happen for many reasons: progression from medium to low or camp, program placement such as RDAP, medical care, court appearances, population management, or discipline. Families generally receive no advance notice.

Federal transportation often routes people through hubs, especially FTC Oklahoma City, where someone may wait days or weeks for the next leg. County jails may also be used as temporary holding locations. A regional transfer can take several days; a cross-country move commonly takes 7 to 21 days, and longer delays can occur when court writs or hub backlogs are involved.

During transit:

• Phone access may be unavailable or inconsistent.
• Do not send new mail to the old facility.
• Hold off on new money deposits until the destination is confirmed.
• Existing trust-fund money normally follows the person.
• Medical continuity is supposed to be maintained, but critical medication issues may need attention after arrival.

Sometimes the record disappears instead of displaying “In Transit.” This usually reflects active movement or a 24-to-72-hour intake delay at the receiving institution. Do not expect the old facility to disclose the destination. Check the locator every 24 to 48 hours and wait at least 72 hours after a known arrival before escalating.

When the new facility appears, confirm the address, update mail, ask about visitation approval, and verify phone and CorrLinks access. Visitor approval may not transfer automatically. The register number remains the same, but commissary access and account processing can take one to two weeks after arrival.

Why a Federal Inmate’s Release Date Says “Unknown”

“Unknown” does not automatically mean a life sentence or a catastrophe. Common explanations include:

1. The person is pretrial or has not been sentenced.
2. They were recently designated or transferred and the receiving facility has not completed processing.
3. First Step Act or Second Chance Act credits are being recalculated.
4. A disciplinary matter is affecting sentence computation.
5. They are in state custody on a concurrent sentence, so the BOP does not control the active timeline.

After sentencing, the BOP’s Designation and Sentence Computation Center must calculate the sentence, good conduct time, and applicable credits. A newly designated person may not have a stable date until they arrive and complete intake. After a transfer, the date can temporarily disappear while the old record closes and the new institution processes the person.

First Step Act earned-time credits, good conduct time, RDAP credits, disciplinary sanctions, and corrected sentence information can all move the projected date. If the date changes significantly or remains unknown for more than several weeks, ask the incarcerated person to request their sentence computation or SENTRY computation sheet from the case manager. That document shows the underlying calculation.

Families often cannot receive detailed sentence information without a signed release-of-information form. If you call, ask for the Records department and provide the register number. Do not call every day; take notes, allow several business days, and follow up with specific questions.

The locator’s date is projected, not guaranteed. Do not book travel around it until the date is stable and the facility confirms release arrangements.

How Often the BOP Inmate Locator Updates

The BOP says its public inmate locator is updated daily. That means information is generally extracted from the central database in batches, not displayed in real time. A transfer or arrival may miss one cycle depending on when staff entered it, so “daily” does not mean immediate.

Automated events may appear on weekends, while changes requiring staff action — such as program scores, incident outcomes, or sentence-computation corrections — may wait until the next business day. There is no guaranteed public update time, although overnight processing often makes changes visible by mid-morning Eastern time.

Typical timing:

• New facility after intake: often 24 to 72 hours after physical arrival.
• Transfer blackout: 24 to 72 hours, sometimes much longer.
• Designation or sentence computation: days to several weeks.
• Complex transfer through a hub: commonly 7 to 21 days.

During a transfer, wait 72 hours after known arrival before calling the institution. If there is no update after several days, search by register number and contact the appropriate facility or Records office. Screenshot important dates because the locator does not preserve a public change history.

A “Not in BOP Custody” message alongside a release date often indicates Residential Reentry Center placement or home confinement. The person is no longer physically housed in a BOP institution, but the BOP may still display a projected final release date.

Troubleshooting: When You Get “No Results Found”

Nine times out of ten, an empty result is a search or timing problem.

• Hyphenated names: Try the full hyphenated name, each part separately, and versions without the hyphen.
• Suffixes: Remove Jr., Sr., II, or III.
• Middle names: Search with and without the middle name or initial.
• Aliases: Try known legal or charging aliases.
• Spelling: Test variations such as Sean/Shawn or Catherine/Katherine.
• Register number: Recheck every digit and try it without accidentally adding spaces or punctuation.

If someone was just arrested or sentenced, they may not appear yet. Federal defendants often remain in county jail or U.S. Marshals custody before BOP designation. Contact the U.S. Marshals Service in the charging district or the local detention facility.

The BOP locator generally covers records from 1982 forward. Older records require a different process described below. Also remember that the BOP locator only covers federal Bureau of Prisons custody. A state prisoner, county detainee, or ICE detainee will not appear there.

Federal, State, County, and ICE Searches Use Different Systems

| System | Who It Holds | Where to Search | |---|---|---| | Federal (BOP) | People convicted of federal crimes and housed in BOP custody | BOP Inmate Locator or our tool | | State prison | People convicted of state crimes | That state’s Department of Corrections | | County/local jail | Pretrial detainees, short sentences, and people awaiting transfer | County sheriff or jail roster | | ICE detention | Immigration and deportation cases | ICE Online Detainee Locator System |

For ICE searches, use the person’s A-Number or name and country of birth. An immigration detainee is usually not a BOP inmate, even if the person was previously held in a federal facility.

How to Find Federal Inmate Records From Before 1982

The online locator does not cover people released before January 1, 1982. In 1982, the BOP began using its centralized SENTRY system, but earlier paper records were not fully digitized. Many were transferred to the National Archives and Records Administration under Record Group 129, Records of the Bureau of Prisons.

Start by gathering the person’s full name, approximate birth year, institution, incarceration dates, and any old register or inmate number. Use the NARA Catalog to identify the relevant regional facility and record series. Major holdings may be distributed among NARA locations, including Atlanta, Kansas City, San Francisco, and College Park.

Digitized collections at Ancestry.com, Fold3, and FamilySearch can help, especially for well-known institutions and Alcatraz-era records. However, the period from roughly 1963 to 1982 is often not fully indexed online, making a direct NARA request necessary.

A written request should identify the person, institution, approximate dates, and Record Group 129. For deceased individuals, records are generally more accessible; living-person requests may involve privacy restrictions. Include your contact information and relationship to the subject, and expect processing to take weeks or months.