8xx

8xx is a numeric string that can have multiple meanings depending on context. In mathematics and documentation, 8xx commonly serves as a shorthand to denote any value in the range 800 to 899. It acts as a placeholder for an unspecified number in the eight hundreds, much like 1xx or 2xx are used to indicate other ranges.

In telecommunications, the 8xx range is closely associated with toll-free numbers in the North American Numbering Plan. Numbers beginning with 800 and other 8xx prefixes (such as 888, 877, 866, 855, 844, and 833) are typically toll-free for callers, with the recipient bearing the cost of the call. These prefixes are managed to support customer service and business contact services, and while most 8xx numbers are toll-free, the exact designation depends on the specific prefix and regulatory rules.

In product naming and model numbering, 8xx often appears as part of a series designation. Manufacturers may use the 8xx label to indicate a generation, feature set, or market position within a line of electronics, vehicles, or other equipment. The precise meaning is specific to the company and product line and is not governed by a universal standard.

Overall, 8xx is a flexible construct used across fields to indicate a value in the 800s or to identify toll-free services and product series. Interpreting 8xx requires attention to the surrounding context to determine whether it refers to a numeric range, a telephone prefix, or a model designation.