IP & Network IPv4 Subnet Calculator Calculate network, broadcast, subnet mask, and host range for IPv4 CIDR.
IP & Network Network Transfer Calculator Estimate transfer time and convert common network speed units.
IP & Network Browser and Device Information View browser, screen, locale, and connection information available to this page.
IP & Network DNS Propagation Snapshot Compare DNS answers from Google Public DNS and Cloudflare DNS over HTTPS; the domain is sent to both providers only after consent.
IP & Network IPv6 Subnet Calculator Calculate an IPv6 CIDR network and address range locally without contacting a network service.
IP & Network IP Range Calculator Calculate the first and last address and total address count for an IPv4 or IPv6 CIDR range locally.
IP & Network IP Format Converter Validate and normalize IPv4 and IPv6 addresses and show their hexadecimal representation locally.
IP & Network MAC Address Analyzer Analyze a MAC address locally for format, unicast or multicast, and universal or locally administered bits. No vendor lookup is claimed.
IP & Network HTTP Header Checker (Pasted Headers) Review pasted HTTP response headers for common security headers locally; this tool does not fetch websites.
IP & Network Port Reference Lookup Look up common TCP and UDP port references from a small offline list; no ports are scanned.
IP & Network Traceroute Output Viewer Parse traceroute output pasted by the user; this page does not send probes or discover network paths.
IP & Network SSL Certificate Checker (Local File) Inspect a pasted or local X.509 certificate and its validity dates in the browser; this tool does not connect to a domain or establish trust.
IP & Network WHOIS/RDAP Record Viewer (Pasted Data) Extract common domain registration fields from WHOIS or RDAP text pasted by the user; this tool makes no lookup request.
IP & Network Domain Expiration Date Checker (Manual) Calculate the time remaining until a manually entered domain expiration date; it does not query a registrar.
IP & Network Ping Result Viewer (Pasted Output) Summarize packet loss and round-trip times from ping output pasted by the user; browsers cannot send ICMP probes here.
IP & Network ASN RDAP Data Viewer (Pasted JSON) Inspect ASN fields from RDAP JSON pasted by the user; no external registry query is made.
IP & Network HTTP Status Checker Interpret a pasted HTTP status line or code locally; this tool does not make network requests.
IP & Network User Agent Parser Summarize common browser, operating system, and device hints from pasted user-agent text locally.
