CIDR / Subnet Calculator
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Analyze CIDR networks, calculate subnet details, and check IP membership. Supports IPv4 and IPv6. Pure computation — no external calls.
Use in your AI tool
Use the tools from this page
Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
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Browse all toolsLive probe refreshed Sep 14, 2026 · Endpoint host mcp.mcpbundles.com
AI SkillSKILL.md
Domain knowledge for CIDR / Subnet Calculator — workflow patterns, data models, and gotchas for your AI agent.
CIDR / Subnet Calculator
Pure local computation using standard IP math—no outbound requests.
Capabilities
- Subnet analysis: Given a CIDR string (IPv4 or IPv6), get network address, prefix length, netmask, wildcard (host) mask, address counts, first/last usable hosts (IPv4 respects traditional network/broadcast reservation except /31 and /32 point-to-point and host rules), and IPv4 class (A–E). IPv6 responses omit broadcast/class and include the last address in the prefix instead.
- Membership check: Given an IP and a CIDR, determine whether the address is inside the network. When it is, the tool reports the zero-based offset from the network address. IP and network must be the same IP version.
Gotchas
- IPv6 size: Very large prefixes return huge counts as decimal strings when needed so values stay safe for typical JSON consumers.
- Strict version match: Do not mix IPv4 addresses with IPv6 networks (or the reverse).
- Invalid input: Malformed CIDR or IP strings return a clear error; fix the notation and retry.
Tools discovered (2)
Cidr Calculator Ip Check
Check if an IP address belongs to a CIDR network. Returns membership, offset within the network when applicable, and summarized IP and network details. Supports IPv4 and IPv6.
Cidr Calculator Subnet
Analyze a CIDR notation network. Returns network address, broadcast address (IPv4), subnet mask, wildcard mask, total addresses, usable hosts, first and last usable host, and IPv4 class. Supports IPv4 and IPv6. Pure computation.
Frequently Asked Questions
What is the CIDR / Subnet Calculator MCP server?
Analyze CIDR networks, calculate subnet details, and check IP membership. Supports IPv4 and IPv6. Pure computation — no external calls. It provides 2 tools that AI agents can use through the Model Context Protocol (MCP).
How do I connect CIDR / Subnet Calculator to my AI agent?
Add the MCPBundles server URL to your MCP client configuration (Claude Desktop, Cursor, VS Code, etc.). The URL format is: https://mcp.mcpbundles.com/bundle/cidr-calculator. Authentication is handled automatically.
How many tools does CIDR / Subnet Calculator provide?
CIDR / Subnet Calculator provides 2 tools that can be called by AI agents, along with a SKILL.md that gives your AI agent domain knowledge about when and how to use them.
What authentication does CIDR / Subnet Calculator require?
CIDR / Subnet Calculator uses open data APIs — no authentication required.
Setup Instructions
Connect CIDR / Subnet Calculator to any MCP client in minutes
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