Convert Numbers for Networking

Convert subnet masks, port numbers, and IP address octets between binary and decimal.

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Input base:

Decimal number

Quick values

Networking tips

🌐

IP address octets are in decimal (0–255). Each octet is one byte — 8 bits. 192.168.1.1 means 11000000.10101000.00000001.00000001 in binary.

📡

Subnet masks like 255.255.255.0 are 11111111.11111111.11111111.00000000 in binary. The number of 1s = prefix length (/24 in this case).

💡

Port numbers 0–65535 fit in 16 bits (2 bytes). Port 80 = 0x50 = 01010000 binary. Port 443 = 0x1BB = 110111011 binary.

🔢

MAC addresses are 6 hex bytes (e.g. FF:FF:FF:FF:FF:FF). Convert each colon-separated byte to see its decimal and binary equivalent.

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