IPv4 / IPv6 CIDR Calculator
Calculate network address, broadcast, netmask, usable host range and host count for any IPv4 CIDR block, plus IPv6 prefix sizes.
Frequently asked questions
How many usable IPs does a /24 have?
254 usable addresses (256 minus network and broadcast).
What prefix do I get with a single VPS?
Usually a single IPv4 plus a /64 or /48 IPv6 prefix depending on the provider.
Try the other tools
VPS Value CalculatorConvert any VPS price to a monthly cost and see the real unit price pe…↗
Bandwidth & Traffic ConverterConvert Mbps to MB/s, translate a monthly traffic quota into average t…↗
Password & Key GeneratorGenerate strong random passwords, API keys and tokens locally in your …↗
Unix Timestamp & Timezone ConverterConvert Unix timestamps to human dates and back, check any timezone of…↗
Base64 / URL Encoder & Hash GeneratorEncode or decode Base64, URL and HTML entities, and generate SHA-1, SH…↗
Cron Expression ExplainerPaste a cron expression and read it in plain language, plus the next f…↗
Website Traffic & Bandwidth EstimatorEstimate the bandwidth and monthly traffic your site needs from page v…↗
Server Total Cost (TCO) EstimatorAdd up hosting, bandwidth overage, backups, licences, domain and admin…↗