48418 ZIP Code: Byron, Michigan
ZIP code 48418 covers Byron, Michigan. It sits in Shiawassee County. A ZIP code is a US Postal Service mail route, not a boundary on a map, so it describes where post is delivered rather than an administrative area.
| ZIP code | 48418 |
|---|---|
| Place | Byron |
| State | Michigan (MI) |
| County or equivalent | Shiawassee County |
| Phone area codes in Michigan | 14 |
| Country | United States |
ZIP codes near 48418
- 48816 Cohoctahabout 3 miles
- 48436 Gainesabout 7 miles
- 48429 Durandabout 7 miles
- 48855 Howellabout 9 miles
- 48451 Lindenabout 9 miles
- 48414 Bancroftabout 9 miles
- 48476 Vernonabout 10 miles
- 48857 Morriceabout 11 miles
Distances are straight-line, between the approximate centres of each delivery area.
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Frequently asked questions
Where is ZIP code 48418?
ZIP code 48418 is in Byron, Michigan, in Shiawassee County. ZIP codes are mail delivery routes rather than mapped regions, so the code identifies a set of addresses the Postal Service serves together, not a district with fixed borders.
What county is 48418 in?
48418 is in Shiawassee County, Michigan. A single ZIP code can straddle a county line, because mail routes were drawn for delivery efficiency and take no notice of county boundaries, so the county shown is the one the code is primarily associated with.
What area code goes with ZIP code 48418?
ZIP codes and telephone area codes are separate systems with different boundaries, so no ZIP code maps to exactly one area code. Michigan uses 14 geographic area codes: 231, 248, 269, 278, 313, 517, 586, 616, 679, 734, 810, 906, 947 and 989.
Is 48418 a real ZIP code?
Yes. 48418 appears in the GeoNames postal-code dataset as an active US code assigned to Byron, Michigan. Codes that have been retired or never issued do not appear, which is why entering one on this site returns a not-found page rather than a blank record.
Why do ZIP code boundaries look odd on maps?
Because they are not boundaries. A ZIP code is a collection of mail routes, and a route is a line a carrier walks or drives, not an area. Any ZIP code map you have seen is somebody's approximation drawn around the addresses in a code, which is also why two ZIP code maps rarely agree with each other.
Can two addresses in the same ZIP code be in different cities?
Yes, routinely. The Postal Service assigns a preferred city name to each code for addressing purposes, and that name often covers several neighbouring towns, unincorporated areas or a whole postal district. The place shown here is the one the source names for the code, not a claim that every address in it is inside that town's limits.
ZIP code, place, county and location data from GeoNames, used under CC BY 4.0, extracted 2026-08-22. ZIP codes are Postal Service delivery routes, not administrative areas, so a code can cross city and county lines and the place name shown is the one the source records for the code. Coordinates are an approximate centre of the delivery area, not a precise location. Population and time zone are not shown because the source does not publish them.