ZIP prefix directory
4xxxxZIP prefix 4 — Places & codes
These 4,489 ZIP codes share the opening digits 4. Follow the smaller groups or open a code to explore its city, county and postal location.
Open the full directory ↓4,489ZIP codes
- Recorded ZIP range
- 40003–49971
- Associated states & postal regions
- 4
Not every number in this interval is assigned. These groups describe postal numbers, not state borders or official delivery boundaries. Counts follow the primary place listed for each ZIP in the current directory.
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Associated states & postal regions
4xxxx · ZIP codes
Page 1 / 75ZIP codes organize mail delivery, not administrative boundaries. A code can have several city or county associations. Coordinates are approximate; verify delivery addresses with your carrier.