REST API Documentation
NetworkCalc API Documentation
Clean REST endpoints for DNS, subnetting, encoding, security, and account automation.
Use the APIs through simple HTTPS calls with JSON responses. Each endpoint includes parameters, response formats, and ready-to-run examples for cURL, PowerShell, and Python.
Resource-oriented design aligned with CRUD operations: Create Read Update Delete
These APIs are actively maintained, but offered without a formal uptime SLA.
Public APIs
No account required for core tool lookupsBinary Converter
v1.9Converts numbers between bases, like decimal to binary or binary to hexadecimal.
DNS Tools
v1.9Resolves DNS records of various types for a given hostname. Look up DNS, WHOIS, SPF records, and more.
Encoder
v1.9Encode and decode text using URL encoding, Base64 encoding, and Base64URL encoding.
IP Range to CIDR New
v1.9Converts an IP range to CIDR blocks or summarizes a list of blocks, with the exact result and the single covering block side by side.
Security Tools
v1.9Retrieve security details for a website or domain, including TLS certificates.
Subnet Calculator
v1.9Calculates subnet information from an IP address or CIDR address. Includes masks, binary representations, assignable addresses, and more.
VLSM Calculator New
v1.9Plans variable-length subnets inside a parent network from the hosts each one needs, with spare addresses, free space, and the reasoning for every block.
Account APIs
Requires authorization token or signed-in sessionAlerts
v1.9Monitor your network resources with custom alerts in the Alerts API.
Authorization
v1.9Authorize your NetworkCalc account to make API calls securely.
Domains
v1.9Manage and monitor your domains and subdomains through the Domains API.
Reports
v1.9Monitor your domains and subdomains with scheduled and on-demand reports.
Subnets
v1.9Manage your saved subnets through the Subnet API.