Working with IP Addresses and Subnets
- Set / Change an IP Address (7)
- Look Up Your IP Addresses (10)
- Trace Others' IP Addresses (13)
- Network Ping
What Is an IP Address?
An IP address is a binary number that identifies devices on TCP/IP networks. Both IPv4 and IPv6 networks use these addresses to discover and communicate with each other.
Guide to Working With IP Addresses
Learn the basics of finding, changing, and hiding my IP addresses.
What Is an IP Address Conflict?
An IP address conflict occurs when two computers on a local network (or the Internet) have been assigned the same IP address. IP conflicts between two computers normally render either one or both of them unusable for network operations.
What Is a Public IP Address?
Internet standards define certain IP addresses as public. A public IP address cannot be used or accessed inside a local newtork, but it can be used on the Internet.
VPN Services with Access to International IP Addresses
One way to bypass geographic content restrictions on the Web is use a VPN service that offers country IP address support such as the ones described here.
Private IP Addresses and Address Ranges
Using a private IP address on a residential or business computer can improve network security and conserve public addressing space. Learn how private IP addressing works and which IP address ranges qualify as private.
IP Tutorial - IP Address Notation
Learn how to recognize several different types of IP addresses, including private, reserved and invalid ones.
IP Tutorial - Network Numbering
Network numbers look like IP addresses but function differently. Find out how IP networks get numbered and what purpose these numbers serve.
What is a Subnet?
A subnet is a logical grouping of connected network devices. When a subnet is properly implemented, both the performance and security of networks can be improved.
IP Tutorial - Subnetting
Subnets allow IP networks to be subdivided for security and performance purposes. This tutorial explains how subnetting works and provides examples of subnets in practice.
CIDR - Classless Inter-Domain Routing
CIDR - also called supernetting - is one system used by Internet routers to manage IP subnetworks. CIDR was developed in response to a shortage of IPv4 addresses.
What Is An Octet?
An octet in computer technology is an 8-bit quantity. Octets in networking are most commonly associated with a single byte of an IPv4 network address.
0.0.0.0
0.0.0.0 is an Internet Protocol (IP) address. On Windows PCs, having an IP address of 0.0.0.0 indicates failure to join a TCP/IP network. 0.0.0.0 is also used by TCP/IP network software applications to monitor traffic from any valid IP address.
127.0.0.1
127.0.0.1 is an reserved IPv4 address. 127.0.0.1 is a special purpose address conventionally used as a computer's loopback address.
Search Engine IP Addresses
Use this simple database to identify the IP addresses of popular Internet search engines and search spiders. Webmasters use these addresses when analyzing their server logs.