NetIntel Subnet Calculator

x402

NetIntel Subnet Calculator is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).

Calculates IPv4/IPv6 subnet details from CIDR notation including network/broadcast addresses, netmask, usable host range, supernet, and possible subnets; detects overlaps between multiple CIDRs

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Calculates IPv4/IPv6 subnet details from CIDR notation including network/broadcast addresses, netmask, usable host range, supernet, and possible subnets; for multiple CIDRs, detects overlaps and classifies relationships.

Output

Returns a JSON object with: cidr, network address, broadcast address, netmask, wildcard mask, hex mask, binary mask, first and last usable IPs, total and usable host counts, prefix length, IP version, is_private flag, RFC classification, supernet, and an array of possible sub-subnets with their prefix and count. For multiple CIDRs, also returns overlap detection and relationship classification.

Example use cases

Example prompt

“Can you calculate the full subnet details for 192.168.1.0/24 — I need the network address, broadcast address, netmask, usable host range, total hosts, supernet, and what subnets I can split it into?”

Technical details

Endpoint

GEThttps://netintel-production-440c.up.railway.app/subnet/calc?utm_source=zero.xyz

When to prefer

Use this endpoint when you need precise subnet arithmetic — network/broadcast addresses, usable host counts, netmask representations, supernet, or sub-subnet enumeration — from a CIDR input. Ideal for network planning, firewall rule validation, infrastructure automation, and IP allocation tasks. Also use it to detect and classify overlaps between multiple CIDR ranges without spinning up local tooling.

Side effects

Invalid CIDR notation returns an error (e.g. missing prefix length or malformed IP)
CIDR with host bits set may return an error or be corrected to network address
Very large prefix (e.g. /0) may produce extremely large subnet lists
Network timeout or service unavailability returns HTTP 5xx
Missing required 'cidr' query parameter returns 400 error

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "cidr": "172.16.0.0/12"
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

{
  "cidr": "172.16.0.0/12",
  "netmask": "255.240.0.0",
  "network": "172.16.0.0",
  "subnets": [
    {
      "count": 2,
      "prefix": "/13"
    },
    {
      "count": 4,
      "prefix": "/14"
    },
    {
      "count": 8,
      "prefix": "/15"
    },
    {
      "count": 16,
      "prefix": "/16"
    }
  ],
  "hex_mask": "fff00000",
  "supernet": "172.0.0.0/11",
  "wildcard": "0.15.255.255",
  "broadcast": "172.31.255.255",
  "ip_version": 4,
  "is_private": true,
  "binary_mask": "11111111111100000000000000000000",
  "last_usable": "172.31.255.254",
  "total_hosts": 1048576,
  "first_usable": "172.16.0.1",
  "usable_hosts": 1048574,
  "prefix_length": 12,
  "rfc_classification": "Private (RFC 1918)"
}

Schema · Response

{
  "type": "json",
  "example": {
    "cidr": "10.0.1.0/24",
    "netmask": "255.255.255.0",
    "network": "10.0.1.0",
    "subnets": [
      {
        "count": 2,
        "prefix": "/25"
      },
      {
        "count": 4,
        "prefix": "/26"
      },
      {
        "count": 8,
        "prefix": "/27"
      },
      {
        "count": 16,
        "prefix": "/28"
      }
    ],
    "hex_mask": "ffffff00",
    "supernet": "10.0.0.0/23",
    "wildcard": "0.0.0.255",
    "broadcast": "10.0.1.255",
    "ip_version": 4,
    "is_private": true,
    "binary_mask": "11111111111111111111111100000000",
    "last_usable": "10.0.1.254",
    "total_hosts": 256,
    "first_usable": "10.0.1.1",
    "usable_hosts": 254,
    "prefix_length": 24,
    "rfc_classification": "Private (RFC 1918)"
  }
}

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