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>log in to commentSubnet Calc started as an internal tool. Our team was designing and managing networks that were becoming more complex, and the practical process around address allocation was not keeping up. We have designed Subnet Calc to work for teams just like us that don't need a complex IPAM but do require a single source of truth about IP ranges that are in use across the business.
- Free IPv4 & IPv6 subnet calculator
- Browser‑local design persistence
- Cloud projects with version history
- Team collaboration for teams
- Design and split networks locally
Subnet Calc is a fast IPv4/IPv6 subnet calculator with cloud storage, version history and team collaboration.
- for
- Network engineers, DevOps and cloud architects.
- pricing
- freemium
Key features
- IPv4 & IPv6 Designer — Design and split IPv4 and IPv6 networks with CIDR support.
- Browser-local Persistence — Free tier stores designs in the browser’s local storage.
- Cloud Projects — Paid plans save designs to the cloud for cross-device access.
- Version History — Every change is recorded, allowing review of design evolution.
- Team Collaboration — Team plans let multiple members share projects and history.
- Export Templates — Export project data using reusable templates for documentation or deployment.
Use cases
- Plan address space for environments, sites or customers before allocation.
- Design VNet/VPC address plans and export them for documentation or deployment.
- Continue work on subnet designs from any device using cloud projects.
- Share a single source of truth for network plans across a team.
Subnet Calc pricing
- Individual$49.99/year/yearUp to 5 projects · Single user · Cloud projects · Version history
- Individual Lifetime$59.99Up to 5 projects · Single user · Lifetime access · Cloud projects
- Small Team$239.99/year/yearUp to 15 projects · Up to 5 members · Team collaboration · Priority support
- Midsize Team$549.99/year/yearUp to 50 projects · Up to 15 members · Team collaboration · Priority support
- Large Team$1399.99/year/yearUp to 250 projects · Up to 50 members · Team collaboration · Priority support
Subnet Calc FAQ
Where are my playground designs stored?+
Designs are stored in the browser’s local storage and are lost if you clear your data; paid plans store them as cloud projects.
Do I need to pay to save designs to the cloud?+
Yes, cloud projects require a paid plan; the free tier only provides local storage.
Does Subnet Calc support IPv6 as well as IPv4?+
Yes, both IPv4 and IPv6 networks can be designed and split for free.
How does the Individual Lifetime offer work?+
It is a one-time payment of $59.99 for a single user, granting lifetime access while founding-member spots remain.
How many people can share a team plan?+
Team plans have member limits that vary by plan; see the pricing page for specific limits.
Summarized by DevHunt from subnetcalc.com · Sep 29, 2026. Details may change; check the official site.
