SubnetCalc Pro
Julian Christopher Siebert · Utilities
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Chart standing · US
In-app purchases · US
No in-app purchases.
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About
• 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
What's new · 1.3
New in 1.3 — full IPv6 support, a Home Screen widget, Siri Shortcuts, a Bonjour browser, and a Share Extension that turns any IP you find on the web into an instant subnet breakdown. NEW • IPv6 calculator — parse any form (::, embedded IPv4, zone IDs), see compressed & expanded notation, scope (link-local, ULA, multicast, global), and derive SLAAC/EUI-64 from a MAC. • MAC OUI vendor lookup — offline database of ~250 common vendors (Apple, Cisco, AVM, Ubiquiti, Raspberry Pi…) with U/L and multicast flags. • Reverse DNS (PTR) — resolve hostnames from IPv4 or IPv6 addresses. • Bonjour / mDNS browser — discover printers, AirPlay, SSH, HomeKit and more on your local network. • Siri Shortcuts — calculate subnets, look up IPs, or find MAC vendors with your voice. • Home Screen widget — your current local and public IP at a glance. • Share Extension — select any IP in Safari or Mail for an instant subnet breakdown. FIXED • Correct host counts for /31 (RFC 3021 point-to-point) and /32 single-host routes. • VLSM handles exact-fit allocations without overflow and aligns to the network boundary. • Hardened bit-shift math for /0 and /32 edge cases.
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