IP Address ↔ Decimal Converter

Convert between Dotted Decimal format (127.0.0.1) and Long Integer format.

IPv4 Address (Dotted)

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Decimal Number (Integer)

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Clear

An IPv4 address is essentially a 32-bit number. The dotted format is just a human-readable representation of 4 bytes (octets).


            IP: a.b.c.d

            Number = (a × 256³) + (b × 256²) + (c × 256¹) + d