DEEN
The population register (Rahvastikuregister, RR), operated by SMIT, the IT centre of the Ministry of the Interior, is Estonia's central person database — name, personal ID code, residence, family relations, custody and legal capacity. It has the broadest consumer base of any register: from health IT through bailiffs and social insurance to the banks that query it for KYC checks of natural persons (unlike the business register, which they avoid).
The population-register services fall into four clusters — identity (the core), family & custody, residence & contact, and change services. Shares are daily averages over Dec 2025 – May 2026. Each cluster has its own detail page.
The most-used service endpoints across all four clusters, as requests per day. The cluster pill links to the detail page.
| # | Service | Cluster | Calls / day | Avg ms |
|---|
How do the 1.30 M calls/day flow from the service clusters to the 16 largest consumers?
Morning peak, lunch dip, a second afternoon peak and an evening batch rise (synchronisation jobs).
What the aggregate data reveals about Estonia's identity foundation.
No other register has such a broad user base (171 consumers). Health IT, bailiffs, social insurance, police, banks, public-transport ticketing, notaries, the tax board — processes that identify a person start here.
Swedbank, LHV, Citadele and Bigbank query the population register for KYC checks of natural persons. The same banks do not appear as direct consumers of the business register.
When a residence or name changes, the population register propagates it via RR67_muutus and domesticDataExchange to dependent registers — the technical basis of the once-only principle.