Network toolkit
IP & Network Tools, Built for Clear Answers
Inspect public network signals, test browser and DNS exposure, and solve IPv4 and IPv6 planning problems — with tools designed to explain their results.
- 10 live tools
- IPv4 + IPv6
- First-party diagnostics
- In-browser calculations
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Filters the tool directory below as you type.
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01 / Connection & Privacy
See What Your Connection Reveals
These tools observe network-visible signals rather than guessing from browser settings.
- Network enrichmentIP Lookup Identify the routing origin, registrant and approximate network location behind an address, with routing and registration shown separately. IPv4 + IPv6RDAP
- DNS lookupReverse DNS Lookup Resolve a public IPv4 or IPv6 address to its PTR hostname and see whether reverse DNS is configured. PTRIPv4 + IPv6
- Multi-signal testVPN Leak Test Check whether the web path, forced IPv4/IPv6 requests, WebRTC and DNS all agree, and read the result as graded evidence rather than a verdict. First-party
- First-party DNSDNS Leak Test Resolve a one-time hostname under our own authoritative DNS and see exactly which resolver made the query. IPv4 + IPv6
- Browser signalWebRTC Leak Test Read the ICE candidates your browser would offer a peer — no media, no camera or microphone — and compare the public-facing address. First-party STUN
02 / Network Planning
Deterministic Tools for IP Addressing
These calculations run from the input itself — no geolocation estimate, routing lookup or probabilistic score.
- Boundaries Subnet Calculator Network and broadcast address, usable range, mask and prefix details for an IPv4 or IPv6 network. IPv4 + IPv6
- Allocation VLSM Calculator Fit differently sized networks into one address block from a list of host counts, with utilisation and leftover space. IPv4
- Division Subnet Splitter Divide one prefix into equal smaller subnets by new prefix length, subnet count or host capacity. IPv4 + IPv6
- Conversion CIDR & IP Range Converter Move between CIDR notation and explicit first–last address ranges, in both directions, as the smallest exact prefix set. IPv4 + IPv6
- Conflict audit Subnet Overlap Checker Check a list of networks for containment, duplication, adjacency and conflicting ranges. IPv4 + IPv6
- Aggregation / exact vs covering Route Summarization Calculator Exact prefix set versus the smallest single covering supernet — with the extra addresses that supernet introduces made explicit. IPv4 + IPv6In browser
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How results are built
Observed signals, authoritative network context and deterministic calculations — kept distinct, with their limits stated.
Read the full methodology- ObserveRead directly from the connection or test.
- EnrichAdd routing and registration context.
- CalculateApply deterministic IP mathematics.