NetCalc Pro – Network Lab

NetCalc Pro works out a network's addressing plan, generates the commands to configure routers and switches, and checks that everything adds up before you power on the lab.

It is built for networking students, at school, at university or preparing for a certification, and it works just as well for anyone who deals with IP addresses: technicians and sysadmins planning an install, teachers checking an exercise, hobbyists tidying up their home network. Explanations are there when you need them and stay out of the way when you don't.

CALCULATE
• IPv4 calculator with four ways to enter an address, the math explained step by step, and recent calculations; IPv6 calculator with compression, prefixes, subnetting, and EUI-64.
• Equal-size subnetting and VLSM, with networks sorted largest first.
• Color-coded binary view that separates network and host bits, and a map of the used address space.

TOOLS
• Summary of several networks, with the common bits and the extra addresses it covers, plus exact aggregation.
• From any address range to the CIDR blocks that make it up.
• Wildcards, non-contiguous ones included, and an ACL tested line by line against a sample packet.
• Compare networks: same subnet or not, overlaps, the most specific route.

CONFIGURE
• Cisco IOS-style commands for interfaces, static routes, OSPF, RIPv2, EIGRP, VLANs and 802.1Q trunks, DHCP, standard and extended ACLs, NAT/PAT, and basic hardening.
• IPv6 on interfaces with OSPFv3, router-on-a-stick, HSRP, DHCP relay, spanning tree, EtherChannel, and port security.
• Import an existing running-config, or compare it with your project's configuration to see what is missing.

PROJECTS AND CHECKS
• Organize your work into projects with devices and interfaces, with search, duplication, and undo.
• Go from a VLSM plan to routers already linked together, and see a network diagram built from the addresses.
• The checker finds overlapping subnets, duplicate or unusable addresses, unreachable next hops, networks missing from OSPF, DHCP gateways outside the pool, and HSRP and IPv6 mistakes.

LEARN
• Subnetting exercises at three levels, with checking and worked solutions.
• A 21-chapter networking guide, from how a network works to dynamic routing, covering subnetting, VLSM, VLANs, DHCP, NAT, ACLs, firewalls, IPv6, and Cisco IOS commands, with worked examples.
• A checklist to go from plan to lab, and an exam brief worked through step by step.
• A searchable glossary and contextual explanations next to the results.
• Beginner mode with more help, Expert mode when you want less.

EXPORT AND SHARE
• Plans and projects as PDF, with the network diagram, CSV, or text, or shared directly.
• Widgets with the exercise of the day and a prefix table, Control Center controls, and actions for Shortcuts and Spotlight.

ON IPHONE, IPAD, AND MAC
One app for all your devices, with no in-app purchases or ads. Menus and keyboard shortcuts on the Mac. Projects and settings sync through iCloud if you want. English and Italian, light or dark theme, and an accent color of your choice.

YOUR PRIVACY
No account, no tracking: calculations run on your device, and your projects stay yours, on the device and, with sync on, in your private iCloud.

Cisco and Cisco IOS are trademarks or registered trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. NetCalc Pro generates commands in Cisco IOS syntax; it is not developed, sponsored, or endorsed by Cisco and is not affiliated with Cisco. Other trademarks are the property of their respective owners.