| City: | Flint, Michigan |
| Names to Avoid: | Delphi East |
| County: | Genesee County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 10:15:55 PM |
| Population: | No Population Data |
| Area Code: | 810 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 43.0125, -83.6878 |
| Quick Link: |
Delphi East, the former General Motors electronics and components manufacturing complex in Genesee County, Michigan, operates under dedicated ZIP code 48556. The ZIP+4 records identify historic facilities including AC Spark Plug, AC Rochester, and Delco Electronics on Dort Highway and Davison Road. These legendary GM divisions produced ignition systems, electronics, and precision components for decades before the 1999 Delphi spinoff.
AC Spark Plug, founded in 1908 in Flint, was one of the original automotive suppliers. When GM spun off Delphi in 1999, Flint East was among the facilities transferred to the new company. A 2007 agreement kept the plant operating, but it eventually closed in November 2013. The designation was added to postal records in October 2008. Flint is the valid mailing city for this designation.
| Residential: | 0 |
| Business: | 2 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 48556 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 2 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 2Source: USPS |
| Total Delivery Receptacles: | 2Source: 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 48556 is located in Genesee County, Michigan, within the Flint, MI Metropolitan Statistical Area (CBSA 22420) and Michigan's 5th Congressional District. This Metro area has a population of 425,790 people, about 0.00% of whom live in ZIP Code 48556. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Flint, MISource: Census |
| CBSA Number: | 22420Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 425,790Source: Census |
| MSA: | Detroit-Ann Arbor-Flint, MI CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 05Source: USPS |
| Congressional Land Area: | 2348.7 sq miSource: Census |
| PMSA: | Flint, MI PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2629000Source: Census |
| Place Name: | Flint city; MichiganSource: Census |
We could not locate which school district 48556 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 February 1, 2026.