How many digits is a Ukrainian postal code?

A Ukrainian postal index is exactly 5 digits, for example 01001 for central Kyiv. The first two digits identify the oblast or region and the remaining three narrow it to a delivery area. Anything that is not 5 digits is not a valid index.

What does the first part of the code mean?

The leading two digits map to an oblast. For example 01–04 cover Kyiv city, 79 covers Lviv oblast and 65 covers Odesa oblast. This validator uses that two-digit prefix to report the most likely oblast for a given index.

Can a valid format still be an unassigned code?

Yes. The tool confirms the 5-digit format and a known oblast prefix, but it does not have the full Ukrposhta delivery-point database, so a structurally valid code may not be in active use. Treat the oblast mapping as a strong hint, not a delivery guarantee.

Does this work for occupied or disputed regions?

The prefix-to-oblast mapping reflects Ukraine's official postal regions. Delivery availability in some areas may differ from the administrative mapping, so always confirm serviceability with Ukrposhta before shipping to affected regions.

Is my data sent anywhere?

No. The validation and oblast lookup run entirely in your browser with a built-in prefix table. Nothing is transmitted, so it is safe to use inside checkout flows handling customer addresses.

Ukraine Postal Code Validator

A Ukrainian postal index (поштовий індекс) is a 5-digit code used by Ukrposhta. The first two digits identify the oblast, so a quick prefix lookup tells you which region a code belongs to. This tool validates the format and maps the prefix to an oblast, all in your browser.

How it works

Validation has two parts:

Format: after removing spaces, the value must be exactly 5 digits 0–9.
Oblast mapping: the first two digits are matched against a built-in table of oblast prefixes. For example 01–04 → Kyiv city, 79 → Lviv oblast, 65 → Odesa oblast.

If the format is valid and the prefix is in the table, the tool reports the oblast. If the prefix is not recognised, the format may still be valid but the region is reported as unknown.

Example

01001  →  valid, Kyiv (city)
79000   →  valid, Lviv oblast
65000   →  valid, Odesa oblast
1234     →  invalid (only 4 digits)

Notes

The two-digit prefix gives the most likely oblast, but it is a routing hint rather than a guarantee that the exact 5-digit index is an active delivery point — the tool does not embed the full Ukrposhta database. Serviceability in some regions can differ from the administrative mapping, so confirm with Ukrposhta before shipping. All processing is local.