The short answer is no, there is not a 99999 zip code in the United States Postal Service’s system.
Contents
Understanding Zip Codes
Zip codes are 5-digit codes used to efficiently sort and deliver mail. The first digit designates a broad geographic area, with subsequent digits narrowing down the location further.
The Range of Zip Codes
Currently, zip codes range from 00501 (Holtsville, NY) to 99950 (Ketchikan, AK). This range accommodates the vast geographical expanse of the United States and its territories.
Why Not 99999?
While it may seem logical to have a zip code that ends in all nines, the USPS has not assigned this particular code. It’s possible that they are reserving it for future expansion or have other internal reasons for not using it.
Read More: Is There a 00001 ZIP Code?
Conclusion
So, while there is no 99999 zip code at present, it remains to be seen if this code will ever come into existence. The ever-evolving needs of the postal service may one day necessitate the use of this or other high-numbered zip codes.
