Laos.

230 V · 50 Hz on Type A, Type C, Type B, Type E, Type F.

Expect universal-style sockets that swallow several pin patterns: flat-blade Type A and B alongside round-pin C, E and F, all at 230 V and 50 Hz. Adapter kits sold for Thailand work in most guesthouses here too. The voltage matches Europe, so North American gear must be dual-voltage.

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 — Laos. Prose is our own.

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Plug straight in — Laos runs 230 V 50 Hz on Type A, Type C, Type B, Type E, Type F — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A fits
Seats fine — this plug is unearthed by design.
the full story
Type B fits
Seats and keeps its earth.
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.