Holcomb city is located in Illinois State, Ogle County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Holcomb IL zip code by its streets and block numbers if we have some of the Holcomb streets loaded in our website
Holcomb Area Code is 815 and Time Zone is Central (GMT -06:00).
Holcomb Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Holcomb City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Holcomb ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Holcomb, Illinois.
If you want to send a mail to Holcomb City, you should use the 61043 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Holcomb 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 61043 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Holcomb 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 Illinois.