550XX

550xx is a numeric pattern that can refer to different things depending on the context. In the United States ZIP code system, 550xx denotes all five-digit ZIP codes whose first three digits are 550. This prefix is associated with a segment of Minnesota, and the exact codes within this range identify specific towns, post offices, or delivery routes as assigned by the United States Postal Service. The prefix itself is used for grouping and routing in mail handling, while the full ZIP code provides a precise geographic location.

Outside of postal use, 550xx commonly appears as a generic pattern in catalogs, part numbers, or documentation. In such contexts, the leading digits (550) indicate a particular product family or series, while the trailing digits (the two x’s) distinguish individual models, configurations, or versions. For example, a hardware or electronics catalog might list items as 550-01, 550-02, and so on, with the suffixes signaling incremental revisions or variants.

The meaning of 550xx is thus highly context-dependent. When encountered in text, it is important to infer the intended sense from surrounding information, such as whether the discussion concerns mail delivery, catalog numbers, or technical specifications. Without additional context, 550xx remains a broad placeholder pattern used across different domains.

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