Build your IP Subnet Calculator with AI in under 5 minutes
Build an IPv4 subnet / CIDR calculator that turns an address and prefix into the network and broadcast address, subnet mask, wildcard mask, usable host range, host count, IP class, and public/private — all in the browser, with a live prefix slider.
仕組み
ステップ 1
アイデアを入力
作りたいものを自然な文章で入力してください。
ステップ 2
AIがビルド
FloopFloopが本番対応コードを即座に生成します。
ステップ 3
デプロイして公開
数分以内に専用サブドメインでプロジェクトが公開されます。
開発者を採用する代わりにAIでビルドする理由
| FloopFloop | 従来の開発者 | |
|---|---|---|
| リリースまでの時間 | 5分未満 | 2〜8週間 |
| 費用 | $0から | $5,000〜$50,000以上 |
| メンテナンス | プランに含まれる | 継続的な保守契約 |
What is a ip subnet calculator?
An IP subnet calculator takes an IPv4 address and a CIDR prefix and works out everything that follows: the network and broadcast addresses, the subnet and wildcard masks, the range of usable host addresses, how many hosts the block holds, and whether it's a private or public range. It's a daily tool for anyone who designs or troubleshoots networks — planning a VLAN, writing a firewall rule, carving an address space into subnets, or just sanity-checking which network a given IP belongs to. The canonical tools (the subnet and CIDR calculators network engineers keep bookmarked) all do the same job; the details that matter are getting the host-count arithmetic right — including the /31 point-to-point and /32 single-host exceptions — and computing it without the classic 32-bit signed-integer overflow bug that breaks a naive implementation at /0.
Common features
- CIDR input (address + prefix)
- A live prefix slider (0–32)
- Network and broadcast addresses
- Subnet mask and wildcard mask
- First and last usable host
- Usable host count and total addresses
- IP class (A/B/C/D/E)
- Private (RFC 1918) vs public detection
- /31 (RFC 3021) and /32 special-case handling
- Everything client-side, copyable; light and dark themes
Real-world examples
Planning a subnet
An engineer types 10.0.0.0/8 and drags the prefix to /20, watching the usable host count and address range update to size each subnet correctly.
Writing a firewall rule
Someone needs the wildcard mask for an ACL, enters the network in CIDR, and copies 0.0.0.255 straight into the rule.
Checking an address
A developer confirms that 172.16.20.5/20 is a private (RFC 1918) class-B address sitting in the 172.16.16.0 network.
Why FloopFloop fits ip subnet calculator projects
A subnet calculator is the kind of tool you want instant, ad-free, and correct on the edge cases. FloopFloop ships the calculator you want — the fields you use, IPv6 if you ask for it, your team's address plan — on your own domain, with all the math running in the browser. The 'network console' that ships by default lays out every value in clean monospace rows with a prefix slider to explore, and the whole thing is one prompt away from being whatever fits your workflow.
試してみてください
以下のプロンプトをコピーしてFloopFloopに貼り付けてお使いください。
Build an IPv4 subnet calculator. Enter an address in CIDR notation (e.g. 192.168.1.0/24) and show the network address, broadcast address, subnet mask, wildcard mask, first and last usable host, the usable host count, the total addresses, the IP class, and whether it's private (RFC 1918) or public. Add a prefix slider (0–32) that updates everything live. Do the IPv4 math with plain numbers in the 0…2^32-1 range (not 32-bit bitwise ops, so /0 doesn't sign-overflow), and handle the /31 (RFC 3021, both addresses usable) and /32 (single host) special cases. Make each value copyable, keep it deterministic so the first render is hydration-safe, and remember the input in localStorage. 100% client-side.
Create a CIDR calculator like the ones network engineers use: type 10.0.0.0/8 and see the mask, address range, and how many hosts it holds. Keep it in the browser.
Build a subnet mask calculator with a slider for the prefix length so I can watch the host count and range change as I drag it. Add a dark console theme.
Build a tool that takes an IP and CIDR prefix and breaks out the network, broadcast, netmask, wildcard, and usable range — handy for planning VLANs and firewall rules.
よくある質問
What does it calculate from a CIDR like 192.168.1.0/24?
Why are there 254 usable hosts in a /24, not 256?
What's the wildcard mask for?
How is this different from a number base converter?
Is anything sent to a server?
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ビルドを始めますか？
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