Nope, this is the lowest I guess:

> As of my last update in September 2021, the lowest numbered ZIP code in the USA is 00501, which belongs to the Internal Revenue Service (IRS) in Holtsville, New York. However, please note that ZIP codes might change or be added over time, so it's always a good idea to check the most recent data to ensure accuracy.


https://www.unitedstateszipcodes.org/