Home código postal Uruguay
Uruguay código postal validator
How the código postal format works
- Format
- 5 digits
- Example
- 11000
Things to watch for
- Format-only check — does not confirm the código postal actually exists
- Always exactly 5 digits with no separators
- Montevideo is the exception to the usual department-number scheme — its codes all start with 1 rather than following the department's own number
^[0-9]{5}$A Uruguayan código postal is the 5-digit code Correo Uruguayo uses to route mail — for example 11000 for Montevideo. Most of the country follows a straightforward department-number prefix, but Montevideo breaks that pattern deliberately: rather than using the department’s own number, every Montevideo postal code starts with 1, a quirk that reflects the capital’s outsized share of the country’s mail volume. Anyone validating a Uruguayan shipping address, checkout form, or spreadsheet of customer records needs the código postal to be the right length and shape before it’s trusted.
Because the code is a bare 5-digit run with no separator, a transposed digit pair still produces a plausible-looking department prefix, which is exactly the kind of error a shape check catches at the point of entry.
How this validator works
This tool checks that the input is exactly 5 digits with no letters, spaces, or hyphens, entirely in your browser — nothing is sent to a server, and there’s no signup.
What a pass doesn’t tell you
A código postal carries no check digit, so confirming it’s 5 digits long is the most a client-side tool can do — not that Correo Uruguayo has assigned it to a real segment. Confirming that requires Uruguay’s own postal code lookup.
Scope: this page and tool cover código postal format validation only — not address lookup, department matching, or confirming a code is currently in use.
código postal FAQ
Why doesn't Montevideo's postal code match its department number?
Because Montevideo is the one exception to Uruguay's usual department-number scheme — while most departments' postal codes start with their own department number, Montevideo addresses all start with 1 instead, making the capital's codes an outlier worth knowing about when spotting an obviously wrong entry.
What do the digits of a Uruguayan postal code encode?
The first two digits generally identify the department, the third a postal zone within it, and the last two a segment of the urban area — with Montevideo's special 1-prefix as the main exception.
Does a correctly formatted código postal mean it actually exists?
No. This tool only confirms the string is 5 digits — it doesn't check it against Correo Uruguayo's actual assignment list. Confirming a code is real requires Uruguay's own postal code lookup.