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무료 Subnet / CIDR Calculator

Calculate network address, broadcast, usable host range, subnet mask, and host count from any IPv4 address and CIDR prefix.

Runs in your browserNo sign-up, no pop-ups로그인 불필요영원히 무료

IPv4 address

Prefix

/0/8/16/24/32

254

Usable hosts

256

Total addresses

Network address192.168.1.0/24

Usable host range192.168.1.1 – 192.168.1.254

Broadcast address192.168.1.255

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

Mask (binary)11111111.11111111.11111111.00000000

IP classC

Address typePrivate (RFC 1918)

IPv4 subnetting reference. /31 and /32 are handled per RFC 3021 (point-to-point and single-host). All math runs locally in your browser.

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입력

텍스트나 데이터를 입력하세요.

처리

브라우저에서 즉시 처리됩니다. 서버 없음, 대기 없음.

다운로드

결과를 저장하세요. 아무것도 저장되지 않습니다.

✓Completely free — no hidden costs, ever

✓No account, email, or login required

✓Runs entirely in your browser — no uploads

✓Works on any device — phone, tablet, desktop

✓Open and ad-supported, with no tracking

✓Loads fast, with no installation needed