Articles in Category: Network IP Addressing

The IP address is how computers and other devices are identified on a TCP/IP network. Articles relate to IP addresses, how they work, what they are and what they do and do not tell you.

What Can People Tell from My IP Address?

People can tell very little from your IP address. For example, they cannot tell who or where you are. How much they can tell varies a great deal.

Can My ISP See I’m Using a VPN or a Proxy?

If you want to hide your IP address, it’s important to understand the terminology so you get the results you want.

How Do I Find the DNS Server Used By My PC?

How to quickly find the DNS servers used by Windows. They’re typically specified by your ISP, but I’ll also discuss why you might change your DNS servers.

Why Can’t I Connect with a 169.254 IP Address?

When your computer can’t get an IP address any other way, it assigns itself a 169.254 IP address. It’s a sure sign of a problem.

How To Trace an IP Address: Myth Versus Reality

Thanks to popular media, many people expect much more from an IP address than is practically available. I’ll separate myth from fact.

Can I Get Someone’s Name and Address from Their IP Address?

While getting someone’s name and address from their IP address is technically possible, it’s also typically difficult and requires law enforcement.

Your Router’s Two IP Addresses

Every router has at least two IP addresses. It’s a characteristic of how routers do their jobs.

How Do I Change the DNS Used By My Computer?

Sometimes using a DNS service other than that provided by your ISP makes sense. I’ll show you how to make the change.

When I Visit a Web Site, Can the Server Identify Me?

Minimally, web servers get your IP address when you visit. Whether or not that or other information can actually be used to identify you, specifically, depends on a lot of things.

What’s the Difference Between a MAC Address and an IP Address?

A MAC address and your IP address are both key components to networking, but they serve different purposes, and are visible in very different ways.

What is “ping”, and what does its output tell me?

Ping is one of the oldest diagnostic tools. It simply validates connectivity from point A to point B, and in doing so provides additional useful information.

Can a MAC address be traced?

A MAC address can easily be traced for as far as it travels. The problem is, a MAC address doesn’t travel far enough to be useful.

What Is a “Subnet Mask”?

A subnet mask is a way of telling your computer or router what network addresses are local and which are remote.

Finding the Owner of an IP Address

While you cannot find the specific owner of an IP address, I’ll look at a few tools to see what IP-related information you can get.

Does visiting a search-engine cached page prevent the original site from noting my visit?

Even a cached version of a website could send information about you back to the original server. The thing is that we just don’t (and can’t) know.

I’ve been blocked because my IP address is on a blacklist. What do I do?

Finding out that you are on a blacklist can be a nightmare. So how do you get off of it?

Can I Assign an IP Address to a Hub and Router?

In this scenario, you’ll end up with two IP addresses, but the hub and router won’t each get one. I’ll explain.

How Do Those Ads Know Where I Live?

There are several ways websites can reasonably approximate your location and serve up ads specific to locale. We’ll look at each.

Why Doesn’t My Machine’s IP Address Match What I’m Told on the Internet?

Comparing your machine’s IP address to that reported by a website may result in a surprising difference. I’ll explain why that is and why it’s a good thing.

What is DHCP?

DHCP stands for Dynamic Host Configuration Protocol, and is how computers request and receive “dynamic” IP addresses as well as additional configuration information.

What’s Up with this IP Address?

This IP address looks like both the IPv4 address and the IPv6 address that’s been assigned to that particular network node.

What’s My IP Address?

We’ll look at some of the specific information you’re making available to every website you visit, and briefly explain each.

All Worked Up Over IP Tracing

I frequently hear from people who are quite insistent that they be able to trace an IP address to the person behind it. It’s just not that simple.

What Happens If Two Computers Have the Same IP Address?

Two computers should never have the same IP address if they’re on the same network. If they do, results are unpredictable.

Why Does My Home Network Only Work with One Computer at a Time?

If there is a conflict with your IP address, it could result in only one of the machines on your network working at a time.