Network Tools
DNS propagation, traceroute, ping, port scan, WHOIS/RDAP and calculators — all running client-side via free CORS-enabled APIs.
DNS Propagation Checker
Compares the DNS answer returned by Google, Cloudflare and Quad9 resolvers — useful for checking whether a DNS change has propagated globally.
Traceroute
Runs a server-side traceroute (via HackerTarget's free API — limited requests/day) and returns the hop list.
Results will appear here…
Ping Test (HTTP Latency)
Browsers cannot send raw ICMP pings. This measures HTTPS round-trip latency instead — a practical proxy for reachability and responsiveness.
Port Scanner
⚠ Best-effort browser probe of common web ports only. Browsers block raw sockets and many ports (21, 22, 23, 25…) outright, so this cannot replace a real scanner like nmap. Only scan targets you own or are authorized to test.
WHOIS / RDAP Lookup
Uses RDAP (the modern WHOIS replacement) — works for domains and IP addresses, free and CORS-enabled.
CIDR Calculator
Subnet Calculator
MAC Address Vendor Lookup
Identifies the manufacturer (OUI) that a MAC address was assigned to.