how many bits does ipv6 use to represent an address?

An IPv6 address uses 128 bits to represent an address.

Quick Scoop

• IPv6 is a 128-bit addressing system, unlike IPv4’s 32-bit addresses.

• Those 128 bits are written as 8 groups of 4 hexadecimal digits (like 2001:0db8::1).

• Each hex digit represents 4 bits, so 32 hex digits × 4 bits = 128 bits.

In short: when you see a full IPv6 address with 32 hexadecimal characters, you’re still looking at exactly 128 underlying bits of address space.

TL;DR: IPv6 uses 128 bits per address.

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