Addresses and subnets

Network Tools

The CIDR calculator is entirely local. IP Lookup is the single API-backed KitLumi tool: it contacts ipquery.io first and uses ipwho.is only after a network error, rate limit, or server error. Both providers are disclosed before the user submits a request.

Available now

Working network tools

Each tool opens directly and states where its processing happens.

IP Address Lookup

Look up public IP location, network, and ASN data with disclosed primary and fallback providers.

Live

CIDR Subnet Calculator

Calculate IPv4 network, broadcast, mask, and usable host ranges.

Live

Which tool should you choose?

Need	Choose	Reason
Inspect a public address	IP Lookup	Returns approximate network, ASN, and location data from ipquery.io or its conditional ipwho.is fallback; the free workflow has no SLA.
Calculate a private network	Subnet Calculator	Derives masks and ranges without a network request.
Understand privacy	Runtime badge	Distinguishes the two-provider API lookup from local arithmetic.