SubnetCalc Pro

• SUBNET CALCULATOR (IPv4 & IPv6) Calculate network addresses, broadcast, host ranges and more. Smart IP input field with automatic octet separation, number keyboard, and auto-jump. Binary view with color highlighting (network bits blue, host bits green). • IP OWNER LOOKUP Discover who owns an IP address. Shows organization, ISP, ASN, location on map (MapKit) and more. Auto-search after 1 second. Multi-API with fallback (IP-API.com, ipapi.co, ipinfo.io). 24h offline cache. • VLSM CALCULATOR Plan complex subnet structures. Automatic calculation of optimal CIDR values. IP shortage warning. Export as PDF or CSV. History of last 10 plans. • SUBNET REFERENCE Complete table of all subnet masks (/0 to /32). Search/filter function. Favorite stars for frequently used masks. • NETWORK TOOLS - HTTP Ping: Test connectivity with real response times - Port Scanner: Scan common ports (SSH, HTTP, HTTPS, RDP, MySQL) - DNS Lookup: Domain resolution via Google DNS - IP Batch Scanner: Scan IP ranges, CSV export