The Subnet Calculator Every Network Engineer Actually Wants

If you work in networking, you know the pain of calculating subnets by hand. Or using three different websites that are all covered in ads. I built a clean subnet calculator that just works: Features Enter any IP + CIDR prefix (slider from /0 to /32) Instantly see: network address, broadcast, first/last host, total hosts, usable hosts Subnet mask + wildcard mask in decimal and binary IP class detection (A/B/C/D/E) Private vs public IP detection Reference table with all common CIDR blocks Copy any value with one click Quick Example 192.168.1.0/24 : Network: 192.168.1.0 Broadcast: 192.168.1.255 Usable hosts: 254 Mask: 255.255.255.0 Wildcard: 0.0.0.255 Try the Subnet Calculator No ads. No signup. Runs in your browser. Also useful: DNS Lookup — Query any record type WHOIS — Domain registration info SSL Checker — Certificate verification Full toolkit: devtools-site-delta.vercel.app