🇬🇧WebFileTools/CIDR Calculator
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🇬🇧WebFileTools/CIDR Calculator
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CIDR / Subnet Calculator

IPv4 and IPv6 — network, broadcast, hosts, mask, splitter and membership. 100% browser.

Version
IPv4
Prefix
/24
Network address
192.168.1.0
Broadcast
192.168.1.255
First usable host
192.168.1.1
Last usable host
192.168.1.254
Mask
255.255.255.0
Wildcard
0.0.0.255
Total IPs
256
Usable hosts
254
Binary (network)
11000000.10101000.00000001.00000000

Split into subnets

4 subnets
NetworkLast
192.168.1.0192.168.1.63
192.168.1.64192.168.1.127
192.168.1.128192.168.1.191
192.168.1.192192.168.1.255

Membership

✅ In subnet

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What is CIDR Calculator?

CIDR calculator for IPv4 and IPv6: network address, broadcast, host range, mask, wildcard, binary view, subnet splitter and membership tester.

How to use this tool?

Enter a CIDR notation (e.g. 192.168.1.0/24 or 2001:db8::/32), explore the results, then use the splitter or membership checker.

Benefits

  • IPv4 + IPv6
  • Subnet splitter
  • Membership checker
  • Binary view
  • 100% browser

Frequently Asked Questions

Is IPv4 and IPv6 supported?
Yes. Version is auto-detected from the notation and the math adapts (IPv6 has no broadcast, for example).
Is the calculation done on a server?
No, everything happens in your browser in pure TypeScript. No address ever leaves the page.
Can I split a /24 into /26 subnets?
Yes — the splitter lists every subnet of the chosen prefix length with its IP range.

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What is CIDR Calculator?

CIDR calculator for IPv4 and IPv6: network address, broadcast, host range, mask, wildcard, binary view, subnet splitter and membership tester.

How to use this tool?

Enter a CIDR notation (e.g. 192.168.1.0/24 or 2001:db8::/32), explore the results, then use the splitter or membership checker.

Benefits

  • IPv4 + IPv6
  • Subnet splitter
  • Membership checker
  • Binary view
  • 100% browser

Frequently Asked Questions

Is IPv4 and IPv6 supported?
Yes. Version is auto-detected from the notation and the math adapts (IPv6 has no broadcast, for example).
Is the calculation done on a server?
No, everything happens in your browser in pure TypeScript. No address ever leaves the page.
Can I split a /24 into /26 subnets?
Yes — the splitter lists every subnet of the chosen prefix length with its IP range.

Similar Tools

🪪

User-Agent Parser

Paste any User-Agent: browser, OS, device. Bulk mode with CSV export and bot/crawler detection. 100% browser.

Use →
📨

HTTP Headers Decoder

Paste HTTP response headers: CSP, Cache-Control, HSTS, Set-Cookie, Authorization — explained directive by directive. No outbound calls.

Use →
🔒

CHMOD Calculator

Calculate Linux/Unix file permissions with a visual grid. Octal notation, symbolic notation and chmod command.

Use →