21022

21022 is a five-digit code used by the United States Postal Service as part of the ZIP code system to designate a specific geographic area for mail delivery. It is within the 210xx range, which is associated with parts of Maryland. The code helps route, sort, and expedite mail and is typically used in conjunction with ZIP+4 extensions to identify a more precise location for a given address.

The ZIP code system was introduced in 1963 to improve mail efficiency and accuracy. Individual ZIP codes, including 21022, are allocated and periodically updated by the USPS to reflect changes in population, infrastructure, and delivery routes. The boundaries of a ZIP code like 21022 are defined by postal operations and can be adjusted over time, sometimes in response to new housing developments, commercial growth, or reorganization of sorting facilities.

Beyond its postal function, 21022 may appear as a numeric designation in other contexts, such as catalog numbers, model identifiers, or internal coding schemes. In those cases, the digits carry meanings specific to the relevant domain rather than any inherent significance tied to the ZIP code system.

In summary, 21022 identifies a distinct mail delivery area within Maryland under the United States ZIP code framework. It forms part of the broader system of regional codes used to organize mail across the United States.