VLAN Planner
Build a quick VLAN address plan with ID, name, subnet, gateway, and DHCP range suggestions.
Enter network values
Use the example or enter your own subnet, plan, MAC, or port value.
Results update locally in your browser.
Plan VLAN IDs, names, subnets, gateways, and DHCP ranges from a parent IPv4 block.
VLAN plan insights
Visual checks for subnet capacity, host headroom, gateway convention, and DHCP planning.
4 of 4 available /24 subnets allocated.
151 target host slots vs 254 usable per VLAN.
192.168.8.0/22 can hold 4 /24 VLAN subnets and this plan uses 4; choose a larger parent block before adding more VLANs.
Next: Resize the parent address block or reduce VLAN count before implementation.
Copy VLAN review memo
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Print worksheet
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CSV / print export
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| VLAN | Name | Subnet | Gateway | DHCP range | Usable |
|---|---|---|---|---|---|
| 10 | Staff | 192.168.8.0/24 | 192.168.8.1 | 192.168.8.2 – 192.168.8.254 | 254 |
| 11 | Voice | 192.168.9.0/24 | 192.168.9.1 | 192.168.9.2 – 192.168.9.254 | 254 |
| 12 | Cameras | 192.168.10.0/24 | 192.168.10.1 | 192.168.10.2 – 192.168.10.254 | 254 |
| 13 | Guest | 192.168.11.0/24 | 192.168.11.1 | 192.168.11.2 – 192.168.11.254 | 254 |
- Subnet
- 192.168.8.0/24
- Gateway
- 192.168.8.1
- DHCP
- 192.168.8.2 – 192.168.8.254
- Usable
- 254
- Subnet
- 192.168.9.0/24
- Gateway
- 192.168.9.1
- DHCP
- 192.168.9.2 – 192.168.9.254
- Usable
- 254
- Subnet
- 192.168.10.0/24
- Gateway
- 192.168.10.1
- DHCP
- 192.168.10.2 – 192.168.10.254
- Usable
- 254
- Subnet
- 192.168.11.0/24
- Gateway
- 192.168.11.1
- DHCP
- 192.168.11.2 – 192.168.11.254
- Usable
- 254
DNS / NTP / option reminders
- Set DNS servers, search/domain suffix, and NTP/time sources before production cutover.
- Voice networks may need DHCP option 66/150 or vendor-specific options; PXE may need boot options.
- Document lease duration, reservations, exclusions, and relay/helper addresses per VLAN.
Implementation checklist
- Confirm each VLAN owner, purpose, and security zone before creating switch/router configuration.
- Reserve the gateway and infrastructure/static addresses outside the DHCP pool for every VLAN.
- Document DNS, NTP, DHCP options, relay/helper addresses, and lease durations per VLAN.
- Review parent-block growth before adding more VLANs to this range.
- Re-run the plan if endpoint counts or growth assumptions change.
Planning notes
Use this as a worksheet and sanity check, not an automatic production configuration. Confirm VLAN IDs, routed interfaces, DHCP reservations, firewall rules, switch trunks, cloud ranges, and documentation standards before deploying changes.
Get a better answer from the VLAN Planner
- Start with the example values to see how the tool behaves.
- Swap in your own numbers, even if they are rough first-pass estimates.
- Change one input at a time so you can see what actually moves the result.
What the result means
The result turns network notation into something easier to read: ranges, host counts, masks, wildcard masks, ports, or planning blocks.
How to use it
Use the output to plan or double-check, then compare it with the real network before changing a route, VLAN, DHCP scope, firewall rule, or ACL.
What can change it
A valid network number can still be wrong for your environment if it overlaps, conflicts with routing, exposes traffic, or breaks change-control rules.
Good for
Create a VLAN addressing worksheet.
Check next
Compare your result with Network Planner, DHCP Scope Planner, Subnet Splitter Calculator when you want more context.
Best habit
Run a conservative case and an optimistic case. The gap between them is often more useful than a single answer.
Common uses
- Create a VLAN addressing worksheet.
- Size each VLAN with growth buffer.
- Document gateways and DHCP ranges.
Common questions
Is the VLAN Planner private?
Yes. CalcShelf calculators run without an account, do not save calculator entries, and do not put raw inputs into shareable URLs or analytics events.
How accurate is the VLAN Planner?
It follows common IPv4, CIDR, mask, range, and port conventions. Production networks still need live-config, routing, ACL, overlap, and change-control review.
What should I check after using the VLAN Planner?
Verify live allocations, overlaps, gateway conventions, routes, ACL/firewall order, documentation, and rollback plan before production changes.
Which calculator should I try next?
Use the related calculators below to cross-check the same decision from another angle before you act.
Method behind the estimate
Networking tools use IPv4, CIDR, subnet mask, wildcard mask, range, VLAN, DHCP, and port-reference rules for planning and sanity checks.
Why the detail matters
Before changing production routing, firewall, VLAN, DHCP, or address plans, verify against the actual network, documentation, and change-control process.
Privacy guardrail
Your calculator values are for you. CalcShelf does not require an account, save calculator entries, put your numbers into shareable URLs, or use raw inputs as analytics events.
Copy or print safely
Use any copy, print, or worksheet controls as local handoff tools for your own notes, supplier calls, lender questions, or implementation checklist. They are there to help you explain the result to a human.
Before acting
Treat the result as a decision draft, not a verdict. Recheck the source numbers, run a downside case, and verify the real-world rule, quote, label, or spec that controls the final answer.
Last reviewed: May 11, 2026. See methodology and editorial policy for formulas, assumptions, rounding, review approach, and limitations. For network changes, verify against live configuration, vendor docs, and change-control requirements.