How many subscribers actually fit behind your public IPs? Port-block sizing with stranded-port waste, guaranteed vs statistical capacity, logging-volume estimates, and a deterministic reverse lookup that maps a public IP and port back to its subscriber block.
Subnet / CIDR Calculator · Bandwidth-Delay Product Calculator · Subnet Quiz · Availability / SLA Calculator · Data-Center Capacity Planner · Tick-to-Trade Latency Calculator · Optical Link Budget Calculator · PTP Timing Budget Calculator · PTP Holdover Planner · ECMP Hash Polarization Visualizer · Network ACL Analyzer — Cisco Access-List Checker · Network config verifier · PTP/SyncE Network-Wide Timing Simulator · Wireshark Display Filter Builder · Wi-Fi Channel Interference Planner · QoS Token-Bucket Policer & Shaper Simulator · BGP Toolkit · iPerf3 Command Builder · MTU/MSS Tunnel Overhead Calculator · Segment Routing Policy Lab · Data Center Fabric Designer · RoCEv2 Lossless Ethernet Planner · Coherent DWDM / 400ZR Reach Planner · Multicast Design Studio · BGP Route Reflector Design Planner · Microburst Buffer Planner · 400G/800G Port Breakout Planner — all free, all run entirely in your browser.