Germany's PLZ: Postleitzahl from 1941 to Today

## The World's First Postal Code

Germany introduced the world's first postal code system in 1941. The original **Postleitzahl (PLZ)** was a 2-digit code designed to speed military and civilian mail during World War II.

After the war, East and West Germany developed separate systems: both used 4-digit codes, leading to duplicate numbers across the divided country.

## Reunification and the 5-Digit PLZ

On July 1, 1993 — three years after German reunification — a completely new 5-digit PLZ system replaced both legacy systems.

| Era | Format | Count |
|-----|--------|-------|
| 1941-1962 | 2 digits | ~24 |
| 1962-1993 (West) | 4 digits | ~2,800 |
| 1965-1993 (East) | 4 digits | ~1,000 |
| 1993-present | 5 digits | ~8,200 |

## Structure

The first digit divides Germany into 10 zones (Leitzonen):

| Digit | Region |
|-------|--------|
| 0 | Saxony, Thuringia, Saxony-Anhalt |
| 1 | Berlin, Brandenburg, Mecklenburg-Vorpommern |
| 2 | Hamburg, Schleswig-Holstein, Bremen |
| 3 | Hanover region, parts of Hesse |
| 4 | Düsseldorf, Ruhr Area |
| 5 | Cologne, Bonn, Aachen |
| 6 | Frankfurt, Saarland |
| 7 | Stuttgart, Baden |
| 8 | Munich, Bavaria (south) |
| 9 | Nuremberg, Bavaria (north) |

## Precision and Usage

Germany's ~8,200 PLZ codes serve 84 million people, making each code serve roughly 10,000 people on average. This is comparable to the US ZIP code density.

PLZ codes are essential for:

- **E-commerce shipping** — DHL, Hermes, and DPD use PLZ for routing
- **Insurance rates** — Auto and home insurance vary by PLZ
- **Market research** — GfK consumer data is indexed by PLZ
- **Emergency services** — PLZ helps route 112 calls

## The Rolf the Postman Campaign

When the new system launched in 1993, Deutsche Post ran a massive campaign starring **Rolf** the cartoon postman — Germany's answer to Mr. ZIP. The campaign cost DM 80 million and included TV spots, print ads, and free PLZ directories mailed to every household.