---
title: "IPv4/IPv6 subnet calculator"
method: GET
path: "/api/subnet"
---

# IPv4/IPv6 subnet calculator

`GET /api/subnet`

## Request

- Base URL: `https://www.ferntool.com`
- URL: `https://www.ferntool.com/api/subnet`
- Auth: none declared

## Query parameters

- `cidr` string, required

## Response `200`

Subnet

- object

## Other responses

- `400`: Invalid CIDR

---

[API](https://skmtc.dev/ferntool/apis/ferntool-network-api.md) · [All operations](https://skmtc.dev/ferntool/apis/ferntool-network-api/llms.txt) · [OpenAPI document](https://skmtc.dev/ferntool/apis/ferntool-network-api/revisions/0097946dd980?raw)