22137

22137 is a United States ZIP code designation used by the United States Postal Service (USPS). ZIP codes are five-digit numbers that identify delivery areas to improve mail routing and geographic addressing.

The ZIP code system was introduced in 1963. In general, the first digit indicates a broad geographic region, the second and third digits designate a sectional center facility or a larger area, and the fourth and fifth digits refine the area to a specific post office or delivery route. ZIP code boundaries can change over time due to population growth, infrastructure changes, and service adjustments.

The code is used not only for mail delivery but also in demographics, marketing, logistics, and urban planning. Because ZIP codes are designed for routing rather than political boundaries, a single ZIP code may cover parts of multiple cities or extend across several municipalities.

For current geographic boundaries, post office locations, and validated place names associated with 22137, official USPS tools and publications provide the authoritative reference.

See also: ZIP code, United States Postal Service, postal code.