Home Почтовый индекс Russia
Russia Почтовый индекс validator
How the Почтовый индекс format works
- Format
- 6 digits
- Example
- 101000
Things to watch for
- Format-only check — does not confirm the почтовый индекс actually exists
- Always exactly 6 digits with no separators
- Introduced in 1971 under the Soviet postal system and still used unchanged today, across a territory spanning eleven time zones
^[0-9]{6}$A Russian почтовый индекс (pochtovyi indeks) is the 6-digit postal index Russian Post uses to route mail — for example 101000, historically associated with Moscow’s central post office. The system was introduced in 1971 under the Soviet Union and has run unchanged since, making it one of the longest-standing postal numbering schemes still in daily use anywhere covered on this site. Anyone validating a Russian shipping address, a checkout form, or a spreadsheet of customer records needs the index in the correct 6-digit shape before it’s trusted.
Because it’s a bare run of digits with no separator, a single dropped or transposed digit produces a code that’s still superficially plausible across a country spanning eleven time zones, where a routing mistake can mean thousands of kilometres of difference.
How this validator works
This tool checks that the input is exactly 6 digits with no letters, spaces, or hyphens, entirely in your browser, with nothing sent to a server.
What a pass doesn’t tell you
A почтовый индекс carries no check digit, so matching the 6-digit shape is the most a client-side tool can confirm — not that Russian Post has assigned it to a real post office. Confirming that requires Russian Post’s own postcode lookup.
Scope: this page and tool cover format validation only — not address lookup or confirming a почтовый индекс is currently in use.
Почтовый индекс FAQ
How old is Russia's postal index system?
It dates to 1971, introduced under the Soviet Union, and Russia has kept the same 6-digit scheme unchanged ever since — one of the longer-running unmodified postal code systems still in use today, spanning a territory across eleven time zones.
What does the leading digit of a почтовый индекс mean?
It marks one of a small number of very large postal routing zones covering the entire country — Moscow's central index, 101000, falls in the zone anchored on the capital, but each zone spans a vast geographic area rather than a single city or region.
Does a correctly formatted почтовый индекс mean it actually exists?
No. This tool only confirms the string is 6 digits — it doesn't check it against Russian Post's actual assignment list. Confirming a почтовый индекс is real, and seeing which post office it covers, requires Russian Post's own postcode lookup.