Space map¶

The Map tab on a prefix's detail page lays out the address space inside that prefix as a grid of colored chips, so you can see at a glance what's free, what's used, and where you can carve out your next subnet.

What it shows¶

For each subnet size that fits inside the prefix, the map draws one chip per aligned subnet at that size:

• Green — free. Nothing is registered in that block.
• Rose — used. A child prefix already overlaps that block.
• Amber — see Stray IPs below.

Each row is one subnet size, labelled with a free-count (for example 5/8 free · /19 subnets), so you can read availability top to bottom.

2/2     free  /25 subnets    [ 10.20.30.0/25 ] [ 10.20.30.128/25 ]
4/4     free  /26 subnets    [ /26 ][ /26 ][ /26 ][ /26 ]
8/8     free  /27 subnets    8 cells
…

Hover a rose chip and a tooltip tells you which child prefix is using it.

Using it to plan¶

The space map is built to answer carve-out questions fast:

Click any green chip to start creating a prefix there. The new-prefix form opens with that block pre-filled and the site and VRF inherited from the parent, so you only confirm and save.

Stray IPs (amber cells)¶

Sometimes a block has no child prefix but does already contain individual IP addresses — IPs recorded directly, with no prefix wrapping them. The space map paints those cells amber and shows a small badge with the IP count, so loose addresses don't hide behind a green "looks free" chip.

Click an amber cell to create a prefix over those IPs. The form shows an amber banner warning that the existing IPs will be adopted — that is, re-parented under the new prefix when you save, so the new prefix correctly owns them.

IPv6¶

The map works for IPv6 too. Because a v6 block has astronomically many subnets, the map shows a couple of nibble-aligned levels (a /64 shows its /68s and /72s) rather than thousands of cells. To go deeper, click a free cell and choose Zoom into … — the map re-roots at that block and a breadcrumb lets you climb back out. It's the natural way to navigate a sparse v6 plan one level at a time.

How deep it draws¶

By default the map goes to the host boundary. If that's more than you want to scan, set a shallower cap under Preferences → Display → Space map depth (separately for IPv4 and IPv6) — e.g. stop IPv4 at /29. You can always click a free cell to zoom in past the cap. The preference only ever makes the map shallower, never deeper than the safety limit below.

Limits¶

• Up to eight bits deep. A very large block (say a /8) won't try to draw millions of /24s — it shows the next handful of sizes (IPv6 steps a nibble at a time, capped at 256 cells per row, then you zoom in).
• Down to the host boundary. IPv4 stops at /31; IPv6 at /127. A single host (/32 or /128) isn't shown — that's what the IPs tab is for.
• Sizes with no free space are hidden — there's no point showing "0 free".