Network Tools
Inspect browser information, public IP and DNS records, plan IPv4 ranges, or work with ports, byte units and transfer-time estimates. Calculators and pasted-record parsers run locally. What Is My IP makes a same-origin request to Cloudflare; DNS Lookup sends your chosen name and type to Cloudflare's DNS resolver. These tools do not probe arbitrary remote servers or measure internet speed.
What Is My IP
See the public connection address and selected network metadata observed by Cloudflare.
NetworkDNS Lookup
Look up public DNS records using Cloudflare's recursive resolver and interpret the response status and TTL.
NetworkCIDR Calculator
Calculate IPv4 network boundaries, netmask, broadcast, and usable host count.
NetworkSubnet Calculator
Divide an IPv4 network into equal-sized subnets with a target prefix.
NetworkIP Address Converter
Convert IPv4 between dotted decimal, unsigned integer, hexadecimal, and binary forms.
NetworkIPv4 to Binary Converter
Convert an IPv4 address to four 8-bit binary octets and back.
NetworkPort Lookup
Look up common TCP and UDP port numbers and service names from a local reference list.
NetworkDNS Record Parser
Parse pasted DNS zone or dig-style record lines into owner, TTL, type, and value fields.
NetworkByte / KB / MB / GB Converter
Convert a byte quantity between decimal and binary storage units.
NetworkBandwidth Calculator
Estimate ideal transfer time from data size and network bandwidth.
NetworkUser Agent / Browser Information
Inspect this browser's user agent, language, screen, viewport, and timezone locally.
Choose the right check
Browser Information reads the current tab. The related User-Agent Parser in the Web category interprets text you paste from another environment. What Is My IP shows the connection address observed at Cloudflare, which can be a VPN or proxy exit. DNS Lookup queries a public recursive resolver; DNS Record Parser reads pasted records locally. CIDR and Subnet Calculators plan IPv4 boundaries; address converters show numeric representations. Port Lookup is a local reference, Byte Unit Converter compares units, and Bandwidth Calculator estimates transfer time from the rate you provide.
Interpret results carefully
User-agent labels are estimates, not reliable device identification. CIDR arithmetic describes address ranges, not reachability or allocation in your environment. Review each tool's limitations before using the result in a support report or network configuration.