There are 3,669 zip codes in the U.S. that begin with a zero, most of which are located on the east coast. When a list is exported as a . csv file and contains a zip code beginning with a zero, it is recorded within the . csv as “01234” because zip codes are five digits.

Where is US zip code 00001?

The lowest and highest of these postal codes are both specific to areas in Alaska; The 00001 code is for the N Dillingham area, and the postal code 99950 is for Ketchikan, AK.

Why do some zip codes start with 0?

The first digit designates a broad area, which ranges from zero for the Northeast to nine for the far West. The two following digits are the code of a central post office facility in that region. The last two digits designate small post offices or postal zones.