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IP as integer, hex, and binary

Convert IPv4 and IPv6 addresses to decimal, hex, and binary — and back — exact BigInt arithmetic, full 128-bit decimals never rounded.
Address → numbersNumber → addressConvertClearDecimal integer42540766411282592856903984955389755119Hexadecimal20010db80000000000000000deadbeefBinary, grouped0010000000000001:0000110110111000:0000000000000000:0000000000000000:0000000000000000:0000000000000000:1101111010101101:1011111011101111

- Every value is a BigInt end to end. A v6 integer like 42,540,766,411,282,592,856,903,984,951,653,826,561 keeps all 39 digits — the float rounding that gives every IP library "202824096037518…" artifacts cannot happen here.
- Decimal → address refuses values past the family maximum instead of wrapping.
- Binary is grouped per octet (v4) or per 16-bit group (v6) for reading; the flat string is the same bits.
- Round trips are a tested property: address → decimal → address is identity, both families.
Done

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exact in both directions — no float ever touches the value

Next door in Network

- IP range classifier (/network/ip-classify)
- IPv6 expand & compress (/network/ipv6-format)
All network tools (/network)

Canonical HTML: https://nutter.tools/network/ip-numbers
Markdown version: https://nutter.tools/network/ip-numbers/index.md
Plain-text version: https://nutter.tools/network/ip-numbers/index.txt
Agent index: https://nutter.tools/llms.txt