Is my address plan stored anywhere?

Only where you put it. Nothing is uploaded. Browser storage is off until you tick the box, and even then it stays on that machine. Exporting the JSON is the reliable way to keep a plan.

Does it scan my network?

No. It records what you intend rather than what happens to be responding today, which is a different and more durable thing. Discovery needs an agent on your network; this is the document.

Can two subnets use the same addresses?

Within one routing table, no, and it is reported as an error. In different VRFs it is legitimate — that is what a VRF is for — and the validator allows it.

What does the Recorded column count?

Static assignments you have entered that fall inside that subnet. It is not a measure of live usage, since nothing is polled — it tells you how much of the subnet your documentation accounts for.

Can I move a plan between machines?

Yes. Export the JSON and import it anywhere. The file is plain and readable, so it also sits sensibly in version control alongside your other network documentation.

Home › Networking › IPAM Lite

IPAM Lite

Somewhere to keep an address plan: subnets, gateways, DHCP scopes and the static assignments that everyone forgets. Checked continuously, saved to a file you control.

Local toolYour network plan stays in your browser. Nothing you enter is uploaded, logged, or sent to any server.

Project

Site

Keep this plan in the browser between visits Off. The plan lives only in this tab and is gone when you close it — use Export to keep it.

What it checks, and what it deliberately does not do

Every change re-runs the whole plan through the shared validation engine: overlapping subnets, duplicate VLAN IDs, gateways outside their subnet or on a reserved address, DHCP ranges that fall outside the subnet or cover the gateway, static assignments sitting inside a DHCP pool, duplicate addresses, and subnets running out of room.

VRFs are respected. Two subnets may use the same address space when they are in different VRFs — that is what a VRF is for — and the same is true of individual addresses. Overlap within one VRF is still reported.

It does not talk to your network. Nothing is scanned, pinged or discovered. This records what you intend, which is a different and more durable thing than what happens to be responding today. A real IPAM that polls devices is a server application; this is the document.

Storage is off by default. Nothing is written to your browser's storage unless you tick the box, and even then it stays on that machine. The reliable way to keep a plan is to export the JSON and put it wherever your other documentation lives.

Related tools

VLAN + Subnet Designer generates a scheme to start from. VLSM Designer does the allocation arithmetic. Subnet Calculator inspects any prefix.