Split an IPv4 network into equal subnets, or allocate VLSM subnets from host cou
Split an IPv4 network into equal subnets, or allocate VLSM subnets from host counts (largest first) with ranges and leftovers.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
470 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://network-calc.x402tookit.com/subnet-vlsm
| Category | Everything else |
|---|---|
| Provider host | network-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 470 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"hosts": "Sales:100,Eng:50,Lab:25,Mgmt:10,WAN:2",
"network": "192.168.1.0/24"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"hosts": {
"description": "Host requirements, comma separated, optionally named: LAN-A:100,LAN-B:50,WAN:2",
"type": "string"
},
"network": {
"description": "IPv4 CIDR to divide, for example 192.168.1.0/24",
"type": "string"
},
"newPrefix": {
"description": "Equal split into subnets of this prefix length",
"type": "integer"
},
"parts": {
"description": "Equal split into this many subnets (a power of two, up to 1024)",
"type": "integer"
},
"pointToPoint": {
"description": "true: give 2-host links a /31 (RFC 3021) instead of a /30",
"type": "string"
}
},
"required": [
"network"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"addressesPerSubnet": {},
"allocations": {
"items": {
"properties": {
"broadcast": {
"type": [
"null",
"string"
]
},
"cidr": {
"type": [
"null",
"string"
]
},
"firstUsable": {
"type": [
"null",
"string"
]
},
"fitsInParent": {
"type": [
"boolean",
"null"
]
},
"lastUsable": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"netmask": {
"type": [
"null",
"string"
]
},
"network": {
"type": [
"null",
"string"
]
},
"prefix": {
"type": [
"null",
"number"
]
},
"requestedHosts": {
"type": [
"null",
"number"
]
},
"totalAddresses": {
"type": [
"null",
"number"
]
},
"usableHosts": {
"type": [
"null",
"number"
]
},
"wastedAddresses": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"fits": {
"type": [
"boolean",
"null"
]
},
"freeBlocks": {
"items": {
"properties": {
"addresses": {
"type": [
"null",
"number"
]
},
"cidr": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"mode": {
"type": [
"null",
"string"
]
},
"network": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"subnetCount": {
"type": [
"null",
"number"
]