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High-Performance Commercial Native Suite

IPv4/IPv6 CIDR Supernetting Calculator & Reverse DNS Generator

Advanced IP networking utility for IPv4/IPv6 CIDR subnetting, VLSM address planning, wildcard masks, and automated in-addr.arpa / ip6.arpa DNS zone generation.

Buy Lifetime License ($19.99) Test Live Engine Demo
Competitor Comparison Why SubnetCalc Pro Is Cheaper & Better
Save $275/yr vs SolarWinds IP Subnet Calculator ($295/yr)
Traditional Alternative:
SolarWinds IP Subnet Calculator ($295/yr)
$295/year bundled in engineer toolset
Expensive recurring subscription, bloated Windows installer, invasive sales calls and email marketing
Vivian Commercial Engine:
$19.99 One-Time Perpetual
100% Offline Air-Gapped C++17
One-time $19.99 perpetual license, lightweight 8MB standalone native binary, instant IPv6 + VLSM calculation
Native Desktop Application • Real GTK3 Program Screens
Live Compiled Binary Technical Wiki →
SubnetCalc Pro Native UI Showcase

Core Engine Capabilities

  • Visual bit-grid display for network, subnet, and host bit allocations
  • Variable Length Subnet Masking (VLSM) hierarchical network planner
  • Generates bind-ready reverse DNS in-addr.arpa and ip6.arpa zone files
  • Fast CLI output for shell scripts and automated network provisioning

Dual GUI & Console Interface

Designed for automated batch pipelines and power users alike. Features a high-performance native desktop GUI (GTK3 on Linux / Win32 on Windows) alongside a headless command-line interface with scriptable switches.

# Run native desktop GUI:

./subnetcalc --gui

# Headless batch processing:

./subnetcalc --calc-sample

Interactive Engine Testbed

Microsecond Benchmarking

Test the live commercial engine execution in your browser through Cloudflare Cloud Platform:

Click 'Execute Engine Test' to dispatch benchmark telemetry...
Perpetual Commercial License
$19.99 / one-time