NetworkCalc
networkcalc.com
Provides REST APIs and web tools for network calculations including subnetting, DNS/WHOIS/SPF lookups, security/TLS checks, binary conversion, and encoding, plus account-based domain monitoring.
The NetworkCalc API uses other authentication; has freemium pricing; offers a free tier (Public APIs (Subnet, DNS, Security, Binary Converter, Encoder) are free; Account APIs require authorization). Verified 2026-07-12 with per-field source links.
Base URL
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no sourceFree tier
Public APIs (Subnet, DNS, Security, Binary Converter, Encoder) are free; Account APIs require authorization
networkcalc.com ↗Pricing
Free tier includes all calculators and public APIs; NetworkCalc Pro is $6.99/mo adding domain monitoring, reports, alerts, and account APIs
networkcalc.com ↗Rate limits
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no sourceOpenAPI spec
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no sourceMCP server
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no source