On this page, you can find a list of all zip codes in area code 691. What is a ZIP Code? A ZIP code is a term used to describe the postal code system in the United States. ZIP is the abbreviation of Zonal Improvement plan.

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The ZIP code was created in 1963 as a measure to increase mail sorting efficiency. The standard ZIP code notation used by the United States Postal service uses five digits to identify a delivery area. The first three digits refer to a sectional center facility (or SCF), which is a network of super post offices. The last two numbers designate the specific post office within an SCF’s territory. Through a ZIP code, one can identify the location now. If you’re looking for contact information in the USA, it’s helpful to know the zip codes.

ZIP Code by Area Code 691

ZIP CodeCityState