SubnetCalc Pro

SubnetCalc Pro for the IT-Pros

Only for iPhone

$1.99 · Designed for iPhone. Not verified for macOS.

iPhone

Calculate network addresses fast • 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

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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.

The developer, Julian Christopher Siebert, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • Julian Christopher Siebert
    Size
    • 1.3 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    • Mac
      Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.6 or later.
    Languages
    • English and German
    Age Rating
    4+
    Copyright
    • © Christopher Siebert