Hydro OK ZIP Code
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Hydro city is located in Oklahoma State, Caddo County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Hydro OK zip code by its streets and block numbers if we have some of the Hydro streets loaded in our website
Hydro Area Code is 580/405 and Time Zone is Central (GMT -06:00).
Hydro Zip Code - Oklahoma
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Hydro City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Hydro ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Hydro, Oklahoma.
The Hydro Zip Code is 73048.
If you want to send a mail to Hydro City, you should use the 73048 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Hydro 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 73048 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Hydro 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 Oklahoma.