The fastest way: visit any ‘what is my IP’ service — the What Is My IP tool returns your public IPv4, IPv6 (if available), ISP, geolocation, and reverse DNS in one page. Command line: curl ifconfig.me, curl ipinfo.io/ip, or dig +short myip.opendns.com @resolver1.opendns.com. Note: your public IP is your ISP’s or NAT gateway’s IP, not your device’s LAN IP (10.x.x.x or 192.168.x.x). Behind CGNAT (common for cellular), multiple customers share the same public IP. Your LAN IP comes from ipconfig (Windows) or ifconfig/ip addr (Linux/macOS).
All questions
How do I find my public IP address?
Read the full guide
What Is a MAC Address?
MAC addresses are the physical-layer identifiers that let switches and Wi-Fi access points route Ethernet frames. Every network interface has one, burned in at manufacture. Modern devices randomize MACs to defeat cross-network tracking.