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Vextorium IP Subnet Calculator
x402
Vextorium IP Subnet Calculator is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-15).
Calculates full subnet details for an IPv4/IPv6 CIDR block and optionally checks whether a given IP address belongs to that subnet.
Price / call$0.003
Success—
StatusUnknown
How this service works
558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.
Output
Returns a JSON object containing: the normalized CIDR, network address, subnet mask, wildcard mask, broadcast address, first and last usable host addresses, number of usable hosts, total address count, IP version (4 or 6), address type (private, public, loopback, etc.), IP class (for IPv4), and — if an ip_check was provided — whether that IP belongs to the subnet.
Example use cases
Network planning for a new office
“I'm setting up a new office network on 10.10.5.0/24 — can you give me the broadcast address, first and last usable host, subnet mask, and total number of usable IPs?”
Firewall rule IP membership check
“We got an alert from IP 172.16.45.200 — can you tell me if it falls within our internal subnet 172.16.32.0/20, and also confirm whether that range is private or public?”
IPv6 subnet breakdown for cloud infra
“What are the full details for the IPv6 subnet 2001:db8::/48? I need the network address, prefix, total addresses, first and last host, and address type.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/ip-subnet?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need comprehensive subnet arithmetic in a single call — network, mask, wildcard, broadcast, host range, and optional IP membership testing — for both IPv4 and IPv6. It is ideal for agents performing network planning, firewall configuration, infrastructure validation, or any task requiring IP address classification (private, public, loopback) without needing a local library or subnet math.
Side effects
- Invalid CIDR notation causes a parsing error or error response
- Missing required 'cidr' field returns a validation error
- Host bits set in the CIDR address (e.g. 192.168.1.5/24 vs 192.168.1.0/24) may be normalized or rejected
- Invalid ip_check IP address format may return null membership result
- IPv6 features like class are not applicable and may return null
- Payment failure or x402 authorization issue prevents the request from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cidr | string | Network in CIDR notation, e.g. 10.0.0.0/16 or 2001:db8::/48 |
| ip_check | string | IP to test for membership (optional) |
Output
Schema · Response
{
"type": "json",
"example": {
"cidr": "192.168.1.64/26",
"mask": "255.255.255.192",
"type": "private",
"class": "C",
"input": "192.168.1.77/26",
"prefix": 26,
"network": "192.168.1.64",
"version": 4,
"ip_check": {
"ip": "192.168.1.100",
"belongs": true
},
"wildcard": "0.0.0.63",
"broadcast": "192.168.1.127",
"last_host": "192.168.1.126",
"first_host": "192.168.1.65",
"useful_hosts": 62,
"total_addresses": 64
}
}Tags
x402
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