Professional-grade IP address tools for network engineers, developers, and IT professionals. Calculate subnets, trace routes, lookup locations, scan ports — all free, no registration.
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Calculate network address, broadcast, host range, wildcard mask from CIDR.
Open Calculator IPv4Convert subnet masks to wildcard masks for ACL configuration.
Calculate Wildcard IPv4Convert IP address ranges to minimal CIDR notation blocks.
Convert Range IPv4Plan VLSM subnetting by specifying host counts.
Plan Subnets IPv4Check overlap and containment between two subnets.
Compare IPv6Expand, compress, and calculate IPv6 prefixes.
Calculate IPv6 IPv6Convert IPv6 ranges into minimal CIDR notation.
Convert IPv6Compare two IPv6 prefixes for overlap.
Compare IPv6Convert between IPv4 and IPv6 formats.
Convert NetworkFind geographic location, ISP for any IP.
Lookup NetworkDiscover network owner and routing policies.
Lookup ASN NetworkTest connectivity and measure latency.
Run Ping NetworkMap hop-by-hop network path.
Trace Route NetworkScan for open services and ports.
Scan Ports NetworkDetect VPN, proxy, or Tor exit nodes.
Check NetworkScore IP risk across threat sources.
Check ToolsResolve domains to IP addresses.
Resolve ToolsDiscover your public IP address.
Check ToolsQuery IP/domain registration data.
Lookup ToolsCheck IP against spam blacklists.
Check ToolsIdentify vendor from MAC address.
Lookup ToolsReview announced prefixes and peers.
Lookup ToolsCondense blocks into supernets.
Merge ToolsDetect conflicting address blocks.
Check ToolsExpand CIDR to IP addresses.
ExpandThese tools combine local calculations and public APIs to provide fast, practical IP and network analysis.
Routing changes, cache differences, and API rate limits can alter timing and metadata.
Great for triage and learning. For critical decisions, verify with authoritative sources.
No. All calculations are local or via temporary API calls. We don't log queries.
Yes! These tools are free for personal and commercial use.