Network & Security

Instantly detect your public IPv4 and IPv6 address. See your location, ISP, time zone, and coordinates. Privacy-first — your IP is detected client-side and never stored.

Look up any IP address to find its geographic location, ISP, ASN, time zone, currency, and more. Free IP geolocation tool with lookup history.

Look up domain registration details using the free RDAP protocol. Find registrar, registration date, expiration date, nameservers, and DNSSEC status for any domain.

Query DNS records for any domain — A, AAAA, MX, NS, TXT, CNAME, SOA. Uses Google DNS-over-HTTPS for fast, accurate results with resolution time tracking.

Check HTTP response headers for any URL. Analyze security headers like CSP, HSTS, X-Frame-Options, and get a security score. Find missing security headers.

Check SSL/TLS certificate details for any domain. See issuer, expiration date, days remaining, and certificate chain. Monitor your SSL certificates.

Analyze email headers to trace delivery path, check SPF/DKIM/DMARC authentication, and identify spam. Paste raw headers and see the full hop-by-hop route.

Check username availability across 20+ social media platforms. Generate direct profile links for GitHub, Twitter, Instagram, YouTube, TikTok, Reddit, and more.

Look up the manufacturer of any network device by its MAC address. Identify vendor, OUI prefix, and MAC type (unicast/multicast). Random MAC generator included.

Find all registered subdomains for any domain using public Certificate Transparency (CT) logs. Fast, 100% free, and legal lookup.

Curated interactive directory of 30+ of the best search engines, threat registries, and threat databases.

Generate QR codes for WiFi sharing. Enter SSID, password, and encryption type. Phones scan to auto-connect. Download QR as PNG. Print-friendly layout.

Convert between network speed units (bps to Gbps). Download time estimates for common file sizes. Presets for dial-up, DSL, cable, fiber, and 5G speeds.

Calculate transfer times and bandwidth requirements. Multi-file queue support. Presets for cloud backup, 4K streaming, and video calls. Reverse calculator included.

Calculate subnet details from IP and CIDR. Network/broadcast address, usable hosts, wildcard mask, IP class. Binary representation. Common subnet reference table.

Searchable reference of 50+ common network ports. Filter by category: Web, Database, Email, Remote Access. Shows protocol (TCP/UDP). Copy port info.

Generate DNS records for common setups. A, AAAA, CNAME, MX, TXT, NS, SRV types. Presets for email and website. Output in BIND zone file format.

Generate CORS headers for multiple platforms. Output in HTTP headers, Nginx, Apache, Express.js, Flask formats. Explain each header.

Calculate download and upload times based on file size and connection speed.