Sudan.

230 V · 50 Hz on Type C, Type D.

Sudan runs 230 V at 50 Hz through a mix of two-pin Type C sockets and British-era round-pin Type D. A europlug fits the former directly; a Type D adapter handles older installations. Anything rated 120 V only needs a converter, and power interruptions are common enough to make surge protection worthwhile.

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 — Sudan. Prose is our own.

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

Type A needs an adapter
Sudan's Type C / Type D sockets don't take a Type A plug.
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Type B needs an adapter
Sudan's Type C / Type D sockets don't take a Type B plug.
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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.