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Free Advanced IPv4 & IPv6 Subnet, VLAN and Network Calculator – Easy, Fast, and Accurate

Professional IPv4 & IPv6 Subnet & VLAN Calculator

Professional IPv4 & IPv6 Subnet & VLAN Calculator

Calculate network details, CIDR, binary/hex, reverse DNS, VLSM subnet summary, VLAN info, and learn networking concepts with explanations for beginners.

IPv4 Subnet Calculator

IPv6 Subnet Calculator

VLAN Calculator

Cheat Sheets

IPv4 Subnet Cheat Sheet

CIDR	Subnet Mask	Hosts
/24	255.255.255.0	254
/25	255.255.255.128	126
/26	255.255.255.192	62
/27	255.255.255.224	30
/28	255.255.255.240	14

IPv6 Prefix Cheat Sheet

Prefix	Hosts per Subnet
/64	≈ 18,446,744,073,709,551,616
/56	2^72
/48	2^80
/32	2^96

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