HopCount Network Tools

Offline subnet, IPv6, VLSM, SSH terminal, and network reference tools for field work, labs, and troubleshooting.

HopCount is a fast, offline network toolkit built for engineers, students, and anyone working with IP networks. Calculate IPv4 subnets, walk address spaces, split networks, plan VLSM allocations, inspect IPv6 prefixes, generate EUI-64 addresses, and keep essential protocol/reference data close at hand. HopCount is designed for real field use: quick input, readable results, copyable values, and no account or cloud dependency. Features: IPv4 subnet calculator with network, broadcast, usable range, mask, wildcard, and host count Interactive prefix controls and binary bit visualization Previous, next, parent, and split subnet navigation IPv6 prefix tools, compressed/expanded forms, solicited-node multicast, and EUI-64 VLSM planner for right-sized subnet allocation Vendor-aware reference sheets for routing, switching, QoS, ICMP, ports, and CLI commands SSH terminal with saved host-key verification Fully offline, no account required, no data collection HopCount Pro unlocks advanced reference sheets, VLSM planning, IPv6 tools, SSH terminal access, and future Pro features with a one-time purchase. Whether you are in a wiring closet, datacenter aisle, classroom, lab, or certification study session, HopCount keeps the network math and reference details where you need them.