Subnet Plus vs NetBox

Subnet Plus is a fast, beautiful subnet calculator for network engineers, sysadmins, and students — now completely rebuilt for iPhone and iPad. Type any IPv4 or IPv6 address and instantly see the network address, broadcast, usable host range, subnet mask, wildcard mask, prefix length, total and usable hosts, IP class, and address type. A live prefix stepper lets you dial the mask up or down and watch every value update in real time. NETWORK CALCULATIONS • IPv4 and IPv6, auto-detected • Binary view with network/host bits color-coded • Visual address-space map PRO TOOLS • VLSM Designer — carve a network into right-sized subnets and save the plan • CIDR to subnet mask to wildcard converter • Subnet membership — is an address inside a network? • Range to CIDR, and supernet / aggregate • CIDR cheat sheet NETWORK UTILITIES • DNS Lookup — A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, and reverse PTR — using your device's resolver or any IPv4/IPv6 DNS server you add • Ping — round-trip time and packet loss • Traceroute — see the path to any host • Path Monitor (Pro) — a live, MTR-style traceroute with per-hop packet loss and latency • Network Scanner (Pro) — find the active devices on your local network, their names, and open ports • Email Auth — check a domain's SPF, DKIM, and DMARC records SIRI, WIDGETS & APPLE INTELLIGENCE • Explain this — turn any subnet calculation or Email Auth report into a plain-English explanation, generated on-device by Apple Intelligence • Siri & Shortcuts — calculate a subnet, ping a host, check a port, or ask "What's my network?" by voice, and use the same actions in your own Shortcuts • Live Activities — follow Path Monitor and Network Scanner from the Lock Screen and Dynamic Island • Home Screen widget — pin any saved subnet, with a different subnet per widget SAVE & SYNC • Label and save subnets, VLSM plans, and lookups • Everything syncs across your devices with iCloud • Share and export your results Available in 45 languages. Remove ads with a one-time in-app purchase.

NetBox is a network diagnostics toolbox that brings essential testing tools together, helping you troubleshoot connectivity, analyze server status, and understand your local network anytime, anywhere. 【Key Features】 • Ping: Test host reachability with real-time latency and packet-loss statistics. • Traceroute: Trace the route hop by hop to identify network bottlenecks. • DNS Scan: Query A, AAAA, MX, NS, TXT, SOA, CNAME, and more. • Port Scan: Concurrent full-range scan from port 1 to 65535 with live progress and open-port results. • Whois: Look up domain registration details including registrar and expiration. • Server Check: Verify DNS resolution, HTTP/HTTPS connectivity, response headers, and SSL certificate info. • LAN Scan: Discover online devices and open services on your Wi-Fi network. 【Convenient Experience】 • Save frequently used addresses to favorites and start tests with one tap. • Task logs automatically store results for easy review and comparison. • Supports 33 languages with instant switching. • Favorites and logs sync securely via iCloud. 【Privacy Commitment】 NetBox does not collect, store, or transmit any personal information. All network diagnostics run directly on your device. Task logs and favorites are stored locally and can be synced through your personal iCloud account using CloudKit. We do not use any third-party analytics or tracking services. Whether you are troubleshooting home network issues, verifying server availability, or performing routine network maintenance, NetBox is the professional network assistant in your pocket.