IPv4 address cost planning
Compare IPv4 lease and purchase costs with your own assumptions
Estimate the smallest practical IPv4 allocation for your demand, then compare modeled lease and purchase costs over one time horizon. i.lease does not insert a market price, quote, inventory promise, or investment recommendation.
- Rates
- You enter the lease and purchase assumptions; the tool does not invent a current price.
- Capacity
- Demand plus reserve is rounded to a /24 through /18 block, or multiple /18-equivalent blocks.
- Purpose
- A planning comparison, not a quote, valuation, availability confirmation, or financial advice.
Read the model
Interpret the result before choosing a path
The output aligns capacity and time. It does not replace commercial, technical, registry, legal, tax, or financial review.
- Allocation
- The tool rounds demand plus reserve to the next supported CIDR boundary. Headroom is capacity inside that modeled allocation, not available inventory.
- Cost horizon
- Lease and purchase totals use the same term. Change the horizon to see how recurring lease and holding costs affect the comparison.
- Crossover
- A crossover appears only when the modeled monthly cost difference can offset the upfront difference. It is not a forecast or guaranteed break-even date.
Lease or purchase
Compare more than the headline price
A lower modeled total is one input. The operating model, authority, timing, and exit path can change which option is workable.
- 01
Match the operating window
Leasing can fit staged, variable, or time-bounded demand. Purchase can fit durable capacity when eligibility, capital, timing, and long-term operations support it.
- 02
Verify transaction readiness
Confirm holder authority, applicable RIR policy, receiving-organization eligibility, documentation, contract terms, and who owns each approval.
- 03
Plan deployment and exit
Review origin ASN, LOA, IRR and ROA work, upstream prerequisites, rDNS, geofeed, abuse handling, monitoring, renewal, return, or future transfer.
Model boundary
Know what is not calculated
Only the values entered in the form affect the arithmetic. Record excluded items separately before treating the scenario as decision-ready.
Commercial and regulatory costs
Financing, tax, legal advice, RIR fees, broker charges, diligence, transfer conditions, deposits, renewals, and currency effects are excluded unless represented in an entered cost.
Network operations
Routing, RPKI, IRR, LOA, rDNS, geofeed, reputation review, monitoring, abuse response, change windows, and rollback work are not automatically priced.
External outcomes
Availability, ownership, transferability, registry approval, reachability, reputation, geolocation, performance, resale value, and transaction success are not guaranteed.
Cost planning questions
What the IPv4 cost calculator can and cannot answer
Use these boundaries when carrying the result into procurement or network planning.
What does an IPv4 address cost?
There is no single guaranteed price. Block size, registry status, transfer eligibility, term, routing history, reputation evidence, demand, supply, and negotiated conditions can affect a sourced lease rate or purchase price. This calculator requires you to enter those rates.
Does the calculator show live i.lease prices or inventory?
No. It does not fetch or imply a live quote, listing, benchmark, or available prefix. Review managed leasing or public marketplace listings separately, then verify current terms and availability.
How is the IPv4 block size selected?
Required addresses are increased by the reserve percentage and rounded up to the smallest modeled block from /24 through /18. Larger demand is shown as multiple /18-equivalent blocks and needs a custom capacity review.
Is the lower modeled cost the recommended option?
No. The result is arithmetic based on entered assumptions, not financial, legal, tax, registry, or network advice. Validate authority, eligibility, timing, risk, operations, and exit obligations before deciding.
Turn the scenario into a current availability review
Bring your address demand, region, intended use, origin ASN, term, timing, and sourced commercial assumptions. Current availability and transaction conditions still require separate review.
