ZIP prefix directory
999xxZIP prefix 999 — Places & codes
These 13 ZIP codes share the opening digits 999. Follow the smaller groups or open a code to explore its city, county and postal location.
Open the full directory ↓13ZIP codes
- Recorded ZIP range
- 99901–99950
- Associated states & postal regions
- 1
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.
Associated states & postal regions
999xx · ZIP codes
Page 1 / 1ZIP 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.