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About this tool
Convert an IPv4 address between dotted-decimal, a single 32-bit integer, hexadecimal, octal and binary, and show the four octets broken out.Questions
- Why does 127.0.0.1 become 2130706433?
- The four octets are the bytes of one 32-bit number: 127×256³ + 0×256² + 0×256 + 1. That is why some sites accept the decimal form as the same address.
- Why would I need the integer form?
- Firewalls, access rules and some APIs store addresses as integers because they are cheaper to compare and range-check than strings.