The SolarWinds Free Advanced Subnet Calculator is completely free and fully functional. In fact, it actually delivers four tools in one.

Solarwinds Subnet Calculator Highlights:

Address Details – provides forward and reverse DNS resolution, response time, address translation (hexadecimal and binary) and address class information.

Classful Subnet Creator – calculates subnets based on subnet mask, mask bits, host bits, number of subnets and hosts per subnet.

CIDR Calculator – includes full support for Classless Inter-Domain Routing (CIDR).

Subnet Addresses – generates a list of addresses for any subnet, which then becomes the working document from which to assign current and future IP addresses.

Download Free Solarwinds Subnet Calculator
ftp://ftp.solarwinds.net/SolarWinds/Pub/reseller/SolarWinds-Subnet-Calculator.exe

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Other Available Downloads

Orion Network Performance Monitor Download – Version 9
ftp://ftp.solarwinds.net/SolarWinds/Pub/Reseller/SolarWinds-Orion-v9-EVAL.zip

Orion Network Configuration Manager
http://files1.solarwinds.net/SolarWinds/Pub/Reseller/SolarWinds-Orion-NCM-V5-EVAL.zip

Orion NetFlow Traffic Analyzer
ftp://ftp.solarwinds.net/SolarWinds/Pub/partner/OrionNetFlowTrafficAnalyzer-v3-Full-EVAL.zip

Orion Enterprise Operations Console (EOC)
ftp://ftp.solarwinds.net/SolarWinds/Pub/Reseller/SolarWinds-Orion-EOC-v1-Eval.zip

Orion VoIP Monitor
ftp://ftp.solarwinds.net/SolarWinds/Pub/partner/SolarWinds-Orion-VoIPMon-v2.0-Evaluation.zip

Application Performance Monitor
ftp://files1.solarwinds.net/Pub/SolarWinds-Orion-APM-v2-Evaluation.zip

Toolset
ftp://ftp.solarwinds.com/SolarWinds/Pub/reseller/SolarWinds-Toolset-v9-Engineer-Eval.zip

ipMonitor
ftp://ftp.solarwinds.net/ipMonitor/v9.0/ipm9eval.zip

LANsurveyor
ftp://ftp.solarwinds.net/pub/partner/LANsurveyor-v10-Eval.zip

Free Tool – VM Monitor
http://solarwinds.s3.amazonaws.com/solarwinds/pub/SolarWinds-VMMonitor.zip

Free Tool – TFTP Server
ftp://ftp.solarwinds.net/SolarWinds/Pub/reseller/SolarWinds-TFTP-Server.exe

Free Tool – Exchange Monitor
ftp://files1.solarwinds.net/Pub/SolarWinds-Exchange-Monitor-I.zip

Real-time NetFlow Analyzer
ftp://ftp.solarwinds.net/SolarWinds/Pub/Solarwinds-RealTimeNetflowAnalyzer.zip