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Network Calc: IPv4 Netmask Converter
x402
Network Calc: IPv4 Netmask Converter is a paid API for AI agents from network-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Converts any IPv4 mask representation (prefix length, dotted netmask, wildcard, or hex) into all equivalent forms with host counts and validity flags.
Price / call$0.02
Success—
StatusUnknown
How this service works
Convert an IPv4 prefix length, netmask, wildcard or hex mask into every other form with host counts; flags bad masks.
Output
Returns a structured object containing the input's canonical prefix length, dotted-decimal netmask, wildcard mask, hex mask, binary mask, network bit count, host bit count, total addresses, usable host count, percentage of IPv4 space, number of /24 subnets, classful default, block size in last octet, a validity flag, a human-readable verdict and summary, and reasons if the mask is invalid.
Example use cases
Validate subnet mask from config file
“I found the mask 255.255.254.0 in a router config — is it a valid netmask, and what CIDR prefix and wildcard does it correspond to?”
Firewall ACL wildcard conversion
“I need to write an ACL rule and the firewall uses wildcard masks. What's the wildcard mask equivalent to a /22, and how many hosts does that cover?”
Hex mask decoding from packet capture
“I saw the mask 0xffff0000 in a packet capture — convert it to dotted-decimal netmask and CIDR prefix length and tell me how many addresses are in the block.”
Technical details
Endpoint
GEThttps://network-calc.x402tookit.com/netmask-convert?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to convert between any IPv4 mask notation (CIDR, dotted decimal, wildcard, hex, binary) and obtain a complete picture of host counts and validity in one call. Prefer it over manual calculation or general-purpose code execution when building network automation, validating configs, or populating firewall rules that require wildcard or hex formats.
Side effects
- Invalid or unrecognizable input format returns valid=false with reasons explaining the error
- Ambiguous input (e.g. a number that could be prefix length or octet) may be interpreted as prefix length
- Non-contiguous bit patterns flagged as invalid masks with explanation
- Missing required 'value' query parameter returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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