Understanding IP Addresses

What is an IP Address?

An IP (Internet Protocol) address is a unique numerical label assigned to every device connected to a computer network that uses the Internet Protocol for communication. It serves two primary purposes: identifying the host or network interface and providing the location of the device in the network.

Think of an IP address as a phone number for your device — it allows other devices to find and communicate with it.

IPv4 vs. IPv6

IPv4

Format: Four groups of numbers separated by dots (e.g., 192.168.1.1)
Range: Each group can be 0–255
Total addresses: Approximately 4.3 billion
Status: Still widely used, but addresses are running out

IPv6

Format: Eight groups of hexadecimal numbers separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334)
Total addresses: Virtually unlimited (340 undecillion)
Status: Gradually being adopted to replace IPv4

Types of IP Addresses

Public vs. Private

Public IP Address: Assigned by your ISP and visible to the internet. This is how the outside world identifies your network.
Private IP Address: Used within your local network (e.g., 192.168.x.x). Not directly accessible from the internet.

Static vs. Dynamic

Static IP Address: Permanently assigned and doesn’t change. Often used for servers and websites.
Dynamic IP Address: Temporarily assigned and may change periodically. Common for home internet connections.

How IP Addresses Relate to Your Website

Every web server has an IP address. When you register a domain name and set up hosting, DNS records map your domain name to your server’s IP address. This is why visitors can type example.com instead of remembering a string of numbers.

When you configure your domain’s A record (for IPv4) or AAAA record (for IPv6), you are telling the DNS system which server IP address to direct visitors to.

Finding Your IP Address

Your public IP: Search “what is my IP” in any search engine.
Your server’s IP: Check your hosting control panel or contact your provider.
Command line: Use ipconfig (Windows) or ifconfig / ip addr (Linux/Mac).

Summary

IP addresses are the fundamental identifiers that allow devices to communicate over the internet. Understanding the difference between IPv4 and IPv6, public and private, and static and dynamic IPs helps you better manage your domain, hosting, and network configurations.