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Utilerio
All endpoints

CIDR / Subnet Calculator

POST/api/v1/tools/cidr-calculator

Get network address, broadcast, netmask and usable host range from any CIDR block.

Authentication

Requires an API key in the X-API-Key header.

Try it

POST/api/v1/tools/cidr-calculator

Parameters

inputstringrequired

IPv4 address in CIDR notation, e.g. 192.168.1.10/24.

Request body

{
  "input": "192.168.1.10/24"
}

Response codes

  • 200Success.
  • 400Invalid request — check your body or parameters.
  • 401Missing or invalid API key.
  • 403The API key is not scoped to this endpoint.
  • 429Rate limit exceeded — retry after a short wait.

Language

cURL

Request

curl -X POST https://utilerio.com/api/v1/tools/cidr-calculator \
  -H "X-API-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"input":"192.168.1.10/24"}'

Response

{ "ip": "192.168.1.10", "prefix": 24, "network": "192.168.1.0", "broadcast": "192.168.1.255", "netmask": "255.255.255.0", "wildcard": "0.0.0.255", "firstHost": "192.168.1.1", "lastHost": "192.168.1.254", "totalAddresses": 256, "usableHosts": 254, "isPrivate": true }