NetCalc Pro — Cloud Engineering Suite

Subnet statistics

Total IPs

Usable

Utilization

Leaves

Subnets

0 leaves

Planning

Analysis

Networking

Utilities

Subnet · Label · Notes	IP Range	Usable Range	Network	Broadcast	Netmask	Usable Hosts	Actions
	Type a CIDR, Tab to label, Enter to create.

Set a network + mask to begin.

Fragmentation

0/64

100%

Edit subnet

Name, notes, VLAN and availability zone for the selected subnet.

Label Notes

VLAN Availability Zone

Import

Load a NetCalc snapshot, an all-workspaces bundle, or an IPAM feed.

Format

Single snapshot (JSON) A NETCALC_PRO_SNAPSHOT_V2 file exported from this app. .json All workspaces (JSON) A NETCALC_PRO_WORKSPACES_V1 multi-workspace bundle. .json Infoblox CSV Columns: network, netmask, label, notes, vlan. .csv NetBox YAML Prefix list with `description`, `comments`, `vlan`. .yaml, .yml

Load from file

…or paste content here

Infrastructure as Code

Generate Terraform HCL for the current subnet plan, per cloud provider.

Tool

Terraform HCL modules with one `resource` per subnet.

Provider

terraform · aws · 0 subnets

VLSM Wizard

Auto-split the current network into tiers sized for the host counts you provide.

Host counts per tier Comma-, space-, or newline-separated. Placed largest-first.

Preview appears as you type.

Supernet calculator

Find the smallest CIDR block that contains every input prefix.

CIDRs (one per line)

Results appear here after computing.

Supernet

Merge sibling subnets

Collapse pairs of adjacent leaves back into their parent.

Scanning…

Subnet diff

Compare two workspaces side-by-side. Apply target field changes back to source with one click.

Source workspace Target workspace

Additions

Deletions

Modifications

Select two workspaces and click Generate diff.

Subnet comparison

Flat side-by-side comparison of two workspaces by CIDR.

Workspace A Workspace B

Only A

Identical

Conflict

Only B

Pick two workspaces and click Run comparison.

BGP route aggregation

Fold adjacent same-mask CIDRs into the shortest covering supernet.

BGP routes (one CIDR per line)

Parse errors

Original

Aggregated

Reduction

Paste BGP routes and click Calculate to aggregate them.

VPC peering validator

Check every workspace pair for CIDR overlaps that would block peering.

At least 2 workspaces are required. Click Validate to run.

Bulk label editor

Edit label, notes, VLAN, and AZ across every subnet at once.

CIDR	Label	Notes	VLAN	AZ

Find + replace labels

Rename a substring across every labelled subnet in the active workspace. One undo step.

Find Replace with

Case-sensitive Whole label 0 matches

CIDR	Current label	→	New label

Paste preview

Review the rows about to be created / updated. Nothing commits until you press Apply.

0 rows

Commits as one undo step · Rollback on any validation error

Line	CIDR	Label	VLAN	AZ	Notes

Keyboard shortcuts

Press ? anywhere to open this.

Global

? Open this shortcuts overlay
Ctrl K Open the command palette (workspaces / tools / subnets)
/ Focus the IP search input
Esc Close the topmost modal · clear row selection · revert uncommitted edit
Ctrl Z Undo last structural change
Ctrl Y Redo
Ctrl Shift Z Redo (alternate)

Table editing — inside a cell

Tab Commit + next field: CIDR → label → VLAN → AZ → notes
Shift Tab Commit + previous field
Enter Commit + next field (last field exits the row)
Ctrl Enter Commit + stay in the current cell
↑ ↓ Move to the same column on the previous / next row
Esc Revert uncommitted edit and blur

Row selection

Click row Set selection to just this row
Shift Click Extend selection from the anchor to the clicked row
Ctrl Click Toggle a single row in / out of the selection
Edit a cell With multiple rows selected, editing any meta cell applies the value to every selected row
Ctrl C Copy selected rows to clipboard as CSV (cidr, label, vlan, az, notes) — only when no cell is focused

Create row (pinned at the table bottom)

Type CIDR Enter a new subnet like 10.0.4.0/24
Tab Cycle CIDR → label → VLAN → AZ → notes inside the row
Enter Submit — carves the leaf and applies meta in one undo step
Esc Clear all fields in the create-row
Paste multi-line Paste a CSV / TSV block: 1/2/3+ columns auto-detected. > 3 rows opens the preview dialog.

Row header (no cell focused)

S Split this subnet into two /n+1 children
J Join with sibling
Enter Open the Label Editor modal (notes + all fields)

Command Palette actions (Ctrl+K)

Focus new row Jump to the pinned create-row at the bottom of the table
Find + replace labels Bulk-rename a substring across every labelled subnet
Toggle sidebar Collapse the left sidebar to a 48 px spine, or expand it back

Tips

Share Copies a URL that encodes the full workspace tree + labels
Import Accepts JSON, all-workspaces bundle, Infoblox CSV, NetBox YAML
Radar drawer Live overlap / labelling / VLAN-conflict findings on the right edge

Confirm

> Esc

↑↓ navigate ↵ run Esc close

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Crafted with intention