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10.0.0.0/8 consumed
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172.16.0.0/12 consumed
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192.168.0.0/16 consumed
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RFC 1918 Space
Account / Site
Region
Type
Show Enterprise
Allocated IP space by account / site
IP distribution by RFC 1918 range
Subnet-level detail
CIDR ↕ Name / Site ↕ Type Region Block Size ↕ Status
Capacity Planning
RFC 1918 slot availability, growth projections & carveout analysis
RFC 1918 Space
New VPC / Account size
/ 20 (4,096)
/ 19 (8,192)
/ 18 (16,384)
/ 17 (32,768)
/ 16 (65,536)
Exclude enterprise space
Growth rate (monthly)
5%
Projected exhaustion timeline (at selected growth rate)
Available contiguous blocks — 10.x
Subnet carve-out calculator
Pick any supernet — see exactly how many /21 /20 /19 /18 slots exist, are consumed, and are free
Supernet to analyze
Exclude enterprise
Subnet size IPs / subnet Total slots in supernet Consumed by allocations Free slots % consumed Capacity bar
* "Consumed" counts any known allocated block whose address space overlaps this supernet — including partially overlapping supernets. Free slots = mathematically available given current allocations in the schema. Actual usable slots may differ due to routing constraints or reserved ranges.
Subnet Utilization
Live IP usage across all AWS VPCs, subnets, accounts, and regions
Account
Region
Utilization band
Utilization distribution
Avg utilization by region
IP allocation — used vs available
Top 15 most utilised VPCs
Top 15 under-utilised VPCs
Subnet slot availability calculator
Choose any supernet — the dashboard calculates exactly how many /21, /20, /19, and /18 slots exist in total, how many are consumed by known allocations, and how many remain free for new accounts or VPCs.
RFC 1918 supernet
Enterprise blocks
Highlight size
/20
/19
/18
/17
/16
Available vs consumed slots per subnet size
Slot map — each cell = one highlighted subnet
Hover a cell to see its CIDR. Cyan = free, blue = consumed by known allocation, purple = enterprise.
Free Consumed Enterprise
Slot breakdown by subnet size
Size IPs / subnet Total slots in supernet Consumed slots Enterprise slots Free slots % consumed Utilization bar
* Consumed counts allocated IPs overlapping this supernet, rounded up to nearest slot. Enterprise slots counted separately when "exclude" is chosen.
Subnet Split Calculator
Enter any parent CIDR and choose a target size — every resulting subnet is listed with its IP range and flagged if it conflicts with an existing allocation.
Parent CIDR block
Split into equal subnets of
Conflict check against
Slot map
Free Conflict Enterprise
Subnets
# CIDR First IP Last IP IPs Status Conflicting allocation
Green = free to allocate · Red = overlaps an existing allocation

Add, edit, or remove allocations. Changes apply immediately to all views. Use Export JSON to save your dataset, or Import JSON to reload a snapshot.

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Add new subnet
CIDR *
Name / description *
Account
Type
Region
Used IPs
Enterprise?
CIDR Name / Account TypeRegion Total IPs Used IPs Utilization Enterprise Actions
Edit Used IPs inline · toggle Enterprise · Edit / Remove per row