PLZ-Postleitzahl.com is an online directory for postal codes, places, and regions, operated by HELP Media AG in Zurich. It helps users search by postal code or place name to find a corresponding location or identify the postal code for a known place. The directory covers Germany, Austria, Switzerland, Liechtenstein, the United States, and many other countries, serving individuals and professional users such as logistics providers and marketing teams.

Alongside its core postal-code lookup, the site offers location-related information and links to resources including company entries, commercial-register updates, health-insurance premiums, event listings, and emergency numbers. Its search is designed to be quick and straightforward, with no login, app, or installation required. The site states that its database is regularly maintained and expanded, and that access is free. Users can also explore business and directory services across the wider HELP.ch network, including address marketing and company information. PLZ-Postleitzahl.com is a practical reference for everyday mailing, checking customer data, and locating places.