PBX network planning
Use it when checking SIP phone VLANs, VPN ranges, peer routes, or static addresses before a deployment.
Network Tool
IPv4 calculator for PBX and remote-access planning.
Convert an IPv4 address and CIDR mask into network, broadcast, host range, wildcard, binary values, and optional subnet or supernet planning.
Ready
Enter an IPv4 address and mask.
The calculator runs in your browser and does not send the address anywhere.
Subnet split preview
The optional second mask can show smaller subnets inside a network or the larger supernet that contains an address.
Local browser tool
Inputs are calculated client-side. No lookup API is required for this page.