| City: | Dulles, Virginia |
| Names to Avoid: | Inspection Service Forensic |
| County: | Loudoun County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:03:41 AM |
| Population: | No Population Data |
| Area Codes: | 571 / 703 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 38.9950, -77.4525 |
| Quick Link: |
The U.S. Postal Inspection Service Forensic Laboratory operates under dedicated ZIP code 20104 in Loudoun County, Virginia. First established in 1940 and now housed in a 44,000-square-foot facility near Washington, D.C., this world-class crime laboratory supports postal inspectors investigating mail-related crimes. Forensic scientists analyze questioned documents, fingerprints, narcotics, explosives, firearms, and digital evidence. The laboratory has maintained accreditation since 2009.
Located in the Broad Run Business Center of Ashburn, the facility comprises four specialized units: Questioned Document, Fingerprint, Physical Sciences, and Digital Evidence. This long-established ZIP code has served the laboratory for over two decades. In 2024, laboratory specialists examined more than one million items including 378 terabytes of digital data. Census demographic data is not available for this law enforcement facility. Dulles serves as the valid mailing city.
| Residential: | 0 |
| Business: | 1 |
ZIP Code 20104 is assigned to a single organization or institution. Detailed business demographics are not published for unique ZIP Codes. USPS data shows 0 residential mailboxes and 1 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 1Source: USPS |
| Total Delivery Receptacles: | 1Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 20104 is located in Loudoun County, Virginia, within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area (CBSA 47900) and Virginia's 10th Congressional District. This Metro area has a population of 6,263,796 people, about 0.00% of whom live in ZIP Code 20104, and is subdivided into the Arlington-Alexandria-Reston, VA-WV division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Washington-Arlington-Alexandria, DC-VA-MD-WVSource: Census |
| CBSA Number: | 47900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Arlington-Alexandria-Reston, VA-WV (CBSA Div 11694)Source: Census |
| CBSA Population: | 6,263,796Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 10Source: USPS |
| Congressional Land Area: | 1372.24 sq miSource: Census |
| PMSA: | Washington, DC-MD-VA-WV PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 5123732Source: Census |
| Place Name: | Dulles Town Center CDP; VirginiaSource: Census |
We could not locate which school district 20104 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on January 1, 2026.