Binary, Hex & Addressing Lab
Connect binary and hexadecimal to IPv4 octets, subnet and wildcard masks, classful history, a guided VLSM example, and IPv6 hextets. Use the calculator beside each section — full host-range and VLSM drills stay in the Subnetting Trainer.
Binary explorer
Toggle bits and watch decimal and hexadecimal update instantly.
8 bits = 1 octet (0–255). Powers of two: 128 64 32 16 8 4 2 1
128 · 64 · 32 · 16 · 8 · 4 · 2 · 1
Binary (nibbles)
0000 0000
Binary (octets)
00000000
Decimal
0
Hexadecimal
00
Bit count
8
Grouping
1 octet
Mini practice
One question at a time, scoped to the current subcategory (or mixed in Practice).
Answers stay on this page — nothing is written to the dashboard. Classful questions ask for historical class only; they never claim a class overrides an explicit CIDR prefix.
dec to bin
Convert decimal 71 to 8-bit binary.