172xx

172xx is a numeric designation used as a placeholder or prefix in various systems to denote a range within the 17200–17299 interval. The “xx” indicates two variable digits, so 172xx commonly refers to any code from 17200 to 17299 rather than a single fixed value. This usage is typical in cataloging, inventory, and categorization schemes where a family of items shares a common leading sequence.

In postal numbering, 172xx is associated with a prefix used in the United States Postal Service ZIP code system. Codes beginning with 172 are assigned to portions of Pennsylvania, and the full five-digit ZIP codes in this range designate specific towns or regions within that area. The 17200–17299 block thus serves as a geographical grouping rather than a single location.

In manufacturing and retail catalogs, 172xx often identifies a product family or line. The leading digits 172 encode the general product category or series, while the trailing two digits distinguish variants such as model, color, size, or revision. For example, items labeled 17201, 17202, and so on, would be closely related but differ in specific attributes.

In other contexts, 172xx may appear as a placeholder in documentation, programming, or data schemas to represent any item within that numeric range. It is not a unique identifier on its own but a flexible shorthand used to communicate a set of related codes.