S43

S43 is an alphanumeric designation used in multiple domains to identify routes, equipment, or products. Because there is no universal meaning, the interpretation depends on context and country. In transportation, S43 most often refers to a rail or road designation. In rail systems, S43 is commonly used for suburban or regional lines within S-Bahn networks, with the actual route and timetable differing by country and city. In road networks, S43 can denote a state, regional, or secondary road in countries that use the “S” prefix for such routes; the precise path and length vary by jurisdiction and planning authority.

In other sectors, S43 may appear as a model number for consumer electronics, a catalog code for spare parts, or a document or standard identifier within an organization. For researchers and enthusiasts, S43 can function as an index or classification code within specialized taxonomies, catalogs, or databases.

Because the label is employed across diverse systems, readers seeking information about a specific S43 should first identify the domain (for example, transportation, infrastructure, or technology) and the jurisdiction (country or city). Then consult relevant local or organizational sources to determine the exact meaning, route, or specification.

See also: S-prefix road systems, S-Bahn line designations, common transport numbering conventions, product model numbers.