Calculadora de IP Online Grátis
Calculate IP address range from network address and subnet mask
The IP Range Calculator takes a network address and subnet mask (or CIDR prefix) and returns the complete range of IP addresses in that subnet — the first host, last host, broadcast address, and total address count. Network administrators use it to verify firewall rules, document DHCP pool boundaries, and check whether a specific IP falls within a given subnet.
Frequently Asked Questions
Sobre Esta Calculadora
Every IP subnet has a defined range of addresses, bounded by its network address at the bottom and broadcast address at the top. The hosts within that range — everything in between — are the only addresses that devices can actually use. Knowing the precise boundaries matters when writing access control lists, configuring DHCP, or verifying that two subnets don't overlap.
This calculator works from both directions: enter the network address and mask in dotted-decimal, or use CIDR notation, and it resolves the full range in either case. It also accepts an arbitrary IP and mask and identifies which network that IP belongs to.
Use it alongside the Subnet Calculator when designing address plans, or to quickly answer questions like "does 10.0.5.200 fall in the 10.0.5.192/27 subnet?" without needing to do binary arithmetic in your head.
A Calculadora de IP determina o intervalo completo de endereços em uma sub-rede a partir de um IP e de sua máscara.
Exemplo Resolvido
Finding the host range for a /28 subnet
Entradas:
- Network address: 192.168.10.48
- Subnet mask: 255.255.255.240 (/28)
Passo a Passo:
- /28 means 4 bits for hosts: 2^4 = 16 total addresses
- Network address: 192.168.10.48 (given)
- Broadcast: 192.168.10.48 + 16 − 1 = 192.168.10.63
- First usable host: 192.168.10.49
- Last usable host: 192.168.10.62
- Usable host count: 16 − 2 = 14