Antigua and Barbuda.

230 V · 60 Hz on Type A, Type B.

An unusual pairing: American flat-blade Type A and B sockets carrying 230 V at 60 Hz rather than the 120 V the plug shape suggests. Check every device for dual-voltage support before plugging in — US-only 120 V gear can be damaged despite the familiar outlet.

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 — Antigua and Barbuda. Prose is our own.

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Plug straight in — Antigua and Barbuda runs 230 V 60 Hz on Type A, Type B — 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.