/24
IPv4 Subnet Calculator
Network, broadcast, host range, masks, wildcard, and binary output.
Open tool →Network engineering utilities
The tools network engineers use every day.
Fast calculators, converters, lookups, and field references in one clean place—built for engineers who need an answer without digging through clutter.
Toolbox
Find the answer faster
Start with the most frequently used networking utilities, then expand into references, generators, and troubleshooting guides.
0.0
Wildcard Calculator
Convert subnet masks and CIDR prefixes into Cisco wildcard masks.
Open tool →80
Port Lookup
Search common TCP and UDP ports by number, protocol, or service.
Open tool →dBm
Fiber Loss Calculator
Estimate link loss using distance, connectors, splices, and optics.
Open tool →VLSM
VLSM Planner
Allocate variable-length subnets from largest requirement to smallest.
Coming soonOSPF
OSPF Cost Calculator
Calculate interface cost using reference bandwidth and link speed.
Coming soonMAC
MAC Vendor Lookup
Identify manufacturers from an OUI and normalize common MAC formats.
Coming soonMTU
MTU Overhead Calculator
Compare usable payload after GRE, IPsec, VXLAN, QinQ, and other headers.
Coming soonBuilt for speed, not clutter.
No account required. No unnecessary dashboards. Just useful networking tools that work on desktop or mobile.