Holtsville NY ZIP Code
Holtsville city is located in New York State, Suffolk County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Holtsville NY zip code by its streets and block numbers if we have some of the Holtsville streets loaded in our website
Holtsville Area Code is 631/516 and Time Zone is Eastern (GMT -05:00).
Holtsville Zip Code - New York
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Holtsville City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Holtsville ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Holtsville, New York.
The Holtsville Zip Code is 00501, 00544, 11742.
If you want to send a mail to Holtsville City, you should use the 00501, 00544, 11742 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Holtsville ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 00501, 00544, 11742 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Holtsville city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in New York.