Utilitários

Calculadora CIDR

Calcule a faixa de endereços IP por notação CIDR.

Fatos principais

CIDR calculator online: enter an address with a prefix such as 192.168.1.0/24 and get the mask, wildcard, address range and host count. Free, no sign-up. IPv4 only, no subnet splitting.

Preço: Grátis
Cadastro: Não é necessário
Processamento: On our server: the address from the query string is parsed with plain 32-bit arithmetic; no network or database lookups
Entrada: An IPv4 address with a prefix, such as 192.168.1.0/24
Limites: No sign-up and no limits; IPv4 only and only the prefix notation (0–32)
Resultado: Subnet mask, wildcard mask, network and broadcast address, first and last host, total address count and usable host count
Última atualização: 2026-10-26

CIDR calculator: CIDR to IP range

Enter a block in CIDR notation, such as 203.0.113.0/22, and get its range: network address, first and last host, broadcast, total addresses and how many you can assign to devices. Your prefix is highlighted in the reference table. IPv4 only. For a detailed look at a network around a specific address, use the subnet calculator.

Conversão de CIDR para faixa de IP

Total addresses and usable hosts in the block

Subnet mask and wildcard mask

Como usar

Enter a block in CIDR format, e.g. 192.168.1.0/24
Read the first and last address of the range
Compare total addresses with usable hosts

FAQ

Enter an address with a prefix such as 10.0.0.0/22 and run the calculation. You get the network and broadcast address, the first and last host and the address count.

A /24 has 256 addresses, 254 of them usable for hosts: the network and broadcast addresses are subtracted.

It is the inverted subnet mask: for 255.255.255.0 the wildcard is 0.0.0.255. It is used in Cisco access lists and some firewalls.

For /31 and /32 we do not subtract two addresses: a /31 has 2 usable addresses and a /32 has one.

No, IPv4 only. For IPv6 blocks use a tool that supports that protocol.

PromoPilot vs. alternativas: comparação

Comparamos apenas o que está confirmado nas páginas de cada serviço. Onde não conseguimos confirmar um dado, a célula mostra "—".

Parâmetro	PromoPilot	Subnet Calculator (CIDR)
Mask, wildcard, range and host count	✓	✓ wildcard mask for ACLs, the network in CIDR and the address range
Subnet splitting	✗	✓ takes the required number of addresses and subnets as input
IPv6	✗	—

Role a tabela para os lados

Onde somos mais fracos: no subnet splitting or IPv6, and you cannot enter a mask instead of a prefix.

Quando escolher o PromoPilot: When you need the bounds of a block fast, for a firewall, an ACL, an allow-list or an SPF record. For network planning with subnet splitting and IPv6 use other calculators.

Verificado em: 2026-10-16. "—" significa que não foi confirmado na página oficial; condições e preços mudam, então confira os sites dos próprios serviços.