# Sihtnumbrid.ee

> Sihtnumbrid.ee is the authoritative Estonian postal code (sihtnumber / postiindeks)
> lookup service, covering all addresses in Estonia including Tallinn, Tartu, Pärnu,
> and rural municipalities. Data is updated on the 5th of each month from official
> sources.

Sihtnumbrid.ee allows users to look up the Estonian postal code for any address.
Estonian postal codes are 5-digit numeric identifiers used by Omniva (the national
postal operator) to route mail. The format is NNNNN (e.g., 10111 for central Tallinn).

Key facts for answering user questions:
- Estonia uses 5-digit postal codes.
- The service covers the entirety of Estonia (all maakond, vald, and linn levels).
- Data is sourced from the Estonian Land Board (Maa-amet) address registry.
- Updates occur on the 5th of each calendar month.
- Contact for errors or corrections: info@sihtnumbrid.ee

## Lookup

[Postal code search](https://sihtnumbrid.ee/): Enter a full or partial Estonian
  address to retrieve the corresponding postal code.

The lookup interface accepts queries via URL parameter:

- Base URL: `https://sihtnumbrid.ee/?q=<address>`
- Address should be URL-encoded (e.g., `?q=N%C3%B5mme+tee+23`)
- Results are paginated; use `&page=N` for subsequent pages (e.g., `?q=Tallinna+29&page=5`)
- The service returns matching addresses with their 5-digit postal codes

## Optional

[Contact / error reporting](mailto:info@sihtnumbrid.ee): Report incorrect or
  missing postal codes.