Applications
Interactive tools for network engineers — run entirely in your browser, no data sent to any server.
Networking
Subnet Manager
Plan and manage IPv4 and IPv6 subnets. Calculate network addresses, host ranges, detect overlaps, and organise your IP address space.
IPv4IPv6CIDRSubnetting
DiagnosticsNew
DNS Health Analyser
Diagnose DNS, HTTP/HTTPS, email authentication, CDN, ASN, and port health for any domain, URL, hostname, or IP address. Get a health score and remediation guidance.
DNSEmail AuthTLSCDNIPv6