ISP planning calculator

IPv4 vs CGNAT Calculator

Compare modeled IPv4 lease costs with your own CGNAT platform, recurring cost, sharing ratio, subscriber count, and planning period.

Compare the models Lease IPv4 or IPv6

Model your own numbers

Public IPv4 or CGNAT?

Change every cost assumption. This is a planning model, not a network-design recommendation.

Without CGNAT——

With CGNAT——

Modeled difference——

What the calculator does

It compares cash cost, not architecture quality.

The direct-IPv4 side assumes one leased public IPv4 address per subscriber. The CGNAT side divides subscribers by your sharing ratio, then adds the public IPv4 cost, recurring CGNAT cost, and the upfront CGNAT cost over your planning period.

Direct IPv4Subscribers × monthly IPv4 rate × planning months.

CGNATShared public IPv4 requirement + recurring platform cost + upfront platform cost.

DifferenceThe modeled cash difference over the selected period. It does not score operational complexity.

Important assumptions

CGNAT changes more than the address bill.

Carrier-grade NAT can add logging, port-allocation, support, lawful-request, application-compatibility, redundancy, capacity, and troubleshooting requirements. Those costs vary widely and should be modeled by the operator.

Model redundant CGNAT capacity, not only one appliance.
Include logging/storage and operational support.
Check application and inbound-connectivity requirements.
Plan IPv6 deployment separately; CGNAT is not an IPv6 strategy.
Use your actual vendor quote and address economics before making a procurement decision.

IP operations toolkit

Keep working with the address space.

Use the other LogicWeb tools for pricing, planning, routing, and deployment.

IPv4 Price IndexA dated IPv4 pricing index that applies a visible planning buffer to cited public lease and purchase benchmarks, with LogicWeb published lease pricing for context.IPv4 Lease vs Buy CalculatorCompare the cash outlay of leasing an IPv4 block with buying it outright using editable market assumptions.IPv4 Scarcity DashboardA compact view of IPv4 supply constraints, buffered planning benchmarks, registry activity, and LogicWeb inventory.BGP Prefix Health CheckValidate a CIDR locally, review common routing risks, and launch independent BGP, RPKI, WHOIS, and geolocation checks.IP Geolocation Propagation TrackerTrack a requested geolocation change across common databases using a browser-saved checklist and dated observations.IPv6 Deployment CalculatorEstimate the IPv6 prefix size your deployment needs and map it to LogicWeb /48, /32, and /29 lease options.

Need a page for a specific prefix or workload? Browse the IP leasing guides.

From planning to production

Need IPv4 while you plan the network?

LogicWeb publishes IPv4 /24 through /18 and IPv6 /48, /32, and /29 lease options with routing and registry support.

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