Network

Free online network and IT tools. Look up IP addresses, calculate subnets, check DNS records, test port availability, parse user agents, look up MAC vendors, and detect your browser details. No sign-up, no upload, works in your browser.

• IP Address Lookup — Look up any IP address to find its country, city, ISP, timezone, and coordinates. Free IP geolocation tool, works instantly in your browser with no sign-up required.
• Subnet Calculator — Calculate subnet mask, network address, broadcast, and usable host range from CIDR notation. Free online subnet calculator, instant results, no sign-up required.
• DNS Lookup — Look up DNS records for any domain including A, AAAA, MX, TXT, CNAME, NS, and SOA. Free online DNS checker, instant results, no sign-up needed.
• Port Checker — Check if a TCP port is open on any host or IP address. Test SSH, HTTP, HTTPS, database ports, and more. Free online port checker, instant results, no sign-up needed.
• User Agent Parser — Parse any user agent string to detect browser name, version, rendering engine, OS, and device type. Free online UA parser, instant results, no sign-up needed.
• MAC Address Lookup — Look up the vendor and manufacturer for any MAC address using the OUI prefix, or generate random valid MAC addresses. Free online MAC lookup tool, no sign-up needed.
• What Is My Browser — Instantly detect your browser name, version, OS, screen resolution, viewport size, timezone, language, touch support, and more. Free browser info tool, no sign-up needed.