Estonia.

230 V · 50 Hz on Type F, Type C.

Estonian sockets are the earthed Schuko Type F at 230 V 50 Hz, with the flat two-pin Type C europlug fitting them all — the same picture as Finland across the gulf. Mainland European gear works unmodified; British and North American plugs need an adapter, and 120 V appliances a voltage converter besides.

The voltage window

A nominal 230 V supply may legitimately sit anywhere between 207 and 253 V (±10%). Dual-voltage gear (marked 100–240 V) shrugs at all of it.

Grid facts verified against IEC World Plugs — Estonia. Prose is our own.

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Pack an adapter — Estonia runs 230 V 50 Hz on Type F, Type C — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A needs an adapter
Estonia's Type F / Type C sockets don't take a Type A plug.
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Type B needs an adapter
Estonia's Type F / Type C sockets don't take a Type B plug.
the full story

Faces drawn to scale from pin dimensions · verdicts are physical fit + voltage math, not safety advice — when in doubt, ask the hardware store, not the internet.