IP Address Types: The 3 Identifiers You Need to Know (2023)

By Tibor Moes / Updated: June 2023

IP Address Types: The 3 Identifiers You Need to Know (2023)

IP Address Types

Imagine you’re hosting a large party and you’ve invited guests from all corners of the world. Each guest is given a unique party pass, so you know exactly who’s who and where they came from. In the realm of internet, these party passes are known as IP addresses. They’re our way of organizing and identifying the countless devices that make up this vast global network. Intrigued? Let’s dive a little deeper.


IP addresses are unique numerical identifiers assigned to each device connected to a network, similar to house addresses in a city. They facilitate communication by identifying senders and recipients, ensuring data packets reach their correct destination.

Type 1 – Public IP Addresses: These are unique across the whole web, just like a phone number. A public IP address ensures that your device can communicate globally, as it’s what identifies you to the rest of the online world.

Type 2 – Private IP Addresses: These are like the internal phone extensions within a company. They’re unique within their own local network, such as your home Wi-Fi or a company network. They can’t be accessed directly from the internet, offering an additional layer of security.

Type 3 – Dynamic IP Addresses: These are temporary addresses assigned each time a device connects to the internet. They’re like hotel room numbers, changing each time you “check-in” to the network. This flexibility is a great way to manage limited address space efficiently and add an extra layer of user privacy.

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IP Address Types In-depth

Public IP Addresses

Imagine this – you’re at a colossal worldwide party, and every attendee, from Tokyo to Toronto, is wearing a unique badge. These badges not only help identify each person but also where they come from. This is essentially what Public IP Addresses do in the digital realm, but rather than people, they identify devices.

Each device that hops onto the global party known as the internet is given a unique, public IP address. This address serves as the device’s badge, a unique identifier that distinguishes it from the billions of other devices connected to the same network.

Think of a public IP address as your home’s address in your city. Let’s say you’re in Los Angeles, and you’ve ordered a package from New York. How does the delivery person know where to drop off the package? Thanks to your house’s unique address, your package arrives at your doorstep, not your neighbor’s. Similarly, public IP addresses guide data across the vast reaches of the internet, ensuring it arrives accurately at its destination.

But there’s more to the story. Public IP addresses aren’t just static numbers. They’re dynamic, meaning they can change. Using our party analogy, it’s as if guests could swap their badges. This swapping is controlled by your Internet Service Provider (ISP), and it usually happens when you restart your modem or router. It’s like moving houses within the same city – your address changes, but you’re still in Los Angeles.

Why do ISPs do this? There are a couple of reasons. First, it’s a way to manage the limited pool of available addresses. Just as there’s a finite amount of real estate in a city, there’s a limited number of IP addresses. By recycling these addresses, ISPs can accommodate more users.

Second, it adds a layer of security. Just as constantly moving houses would make it difficult for someone to track your whereabouts, frequently changing IP addresses makes it harder for unwanted parties to track a device’s online activity.

However, it’s crucial to remember that while public IP addresses offer a level of anonymity, they’re not completely private. They’re like postcards traveling through the postal system. While they carry your unique mark, they are visible to various nodes on the internet, including ISPs and websites you visit. This is where the other types of IP addresses, such as private and dynamic, come into play, offering additional layers of security and privacy.

In the grand scheme of internet infrastructure, public IP addresses play a significant role. They’re the badges we wear in this global online party, helping us communicate, connect, and navigate this vast digital landscape. Without them, the internet as we know it wouldn’t exist!

Private IP Addresses

Let’s take our party analogy a bit further. Now, within this gigantic worldwide party, imagine you’re in a private suite where only you and your close friends are allowed. It’s a secure, cozy environment where everyone is assigned a unique nickname that’s known only within your group. In the realm of internet, these nicknames are similar to Private IP Addresses – identifiers that keep our network interactions safe and seamless within our digital ‘suite’.

Private IP addresses are like your secret handshake or a club’s password. They’re unique identifiers that devices use within a smaller, private network such as your home Wi-Fi or a company’s corporate network. When your smartphone, laptop, or any other device connects to your home Wi-Fi, your router assigns it a private IP address. This address acts like a name tag, helping your router know which device in your network is requesting to view a website or play an online game.

But here’s the catch: these addresses are private in the sense that they’re known only within your local network. Just as nicknames make sense within your group but might be unknown to outsiders, private IP addresses aren’t recognized outside of their local networks.

So, how does a device with a private IP address communicate with the outside world? Well, that’s where our old friend, the Public IP address, steps in. It’s like a trusted messenger who takes the request from your device, goes out, fetches what’s needed, and delivers it back to your device. This method, known as Network Address Translation (NAT), helps maintain security as it limits direct exposure of your device to the internet.

You may be wondering, “If private IP addresses are localized, does that mean multiple networks can have the same private IP addresses?” You hit the nail on the head! Private IP addresses can indeed be reused across different networks. This is a clever strategy to preserve the limited number of IP addresses available, similar to how apartment numbers are reused in different buildings across a city. As long as devices within the same network have unique addresses, we’re good to go!

By serving as internal phone extensions within a network, private IP addresses maintain order and security. They form a key part of our internet infrastructure, providing the foundation for the seamless operation of our smart devices. So, next time you connect your device to Wi-Fi, remember, you’re entering a private suite where your device gets a special nickname, a.k.a. a private IP address!

Dynamic IP Addresses

Let’s venture back to our massive global party for one last time. Imagine if every time you reentered the party, you’re given a new unique badge. While it might seem chaotic, it’s actually a brilliant strategy to accommodate a vast number of guests. This is precisely the idea behind Dynamic IP Addresses – they’re like chameleons, changing their colors each time you connect to the digital universe.

A Dynamic IP address is essentially a temporary identifier assigned to your device every time you log on to the internet. Think of it like checking into a hotel. Each time you stay, you’re assigned a different room with a unique number. You use it during your stay, and once you check out, it’s free to be used by the next guest. That’s how dynamic IP addresses work. They’re assigned on a “lease” from a pool of IP addresses and recycled once you disconnect, making it available for the next user.

So why not just have static, unchanging IP addresses? It all boils down to efficiency and privacy. Let’s start with efficiency. Imagine if every hotel room was permanently reserved for each guest. That would mean the hotel would quickly run out of rooms. The same principle applies to IP addresses. There’s a limited number of them, and by using dynamic allocation, we can accommodate the millions of devices connecting and disconnecting from the internet every day.

Now, let’s talk about privacy. Returning to our hotel analogy, having a different room number each time you stay helps ensure a level of privacy. It would be harder for someone to track your stays if your room number kept changing. Similarly, having a dynamic IP address offers an added layer of privacy as it makes it more difficult to track a device’s internet activity.

However, it’s important to note that while dynamic IP addresses enhance privacy, they don’t guarantee anonymity. Just like how a hotel keeps a record of who stayed in which room and when, your Internet Service Provider (ISP) also keeps track of which IP addresses were assigned to your device and when.

In the grand choreography of internet communication, dynamic IP addresses are the agile dancers, flexible and constantly in motion. By efficiently using the limited number of IP addresses and adding a layer of privacy, they help keep the digital party going smoothly, one connection at a time. So, the next time you connect to the internet, remember, you’re a part of this vibrant dance of ever-changing identifiers. You’re a part of the dynamic IP world!


Just like the distinctive badges at a global party, or the unique addresses in a sprawling city, IP addresses serve as the foundation for all online communication. From the public IP addresses that identify us on the worldwide web, to the private IP addresses that keep our home networks secure, and the dynamic IP addresses that ensure efficient and somewhat private internet use, they’re all crucial components of our digital lives. Without them, the internet, as we know it, wouldn’t exist. So the next time you stream a movie, send an email, or enjoy an online game, remember the silent and invisible force powering your online journey – the IP address!

How to stay safe online:

  • Practice Strong Password Hygiene: Use a unique and complex password for each account. A password manager can help generate and store them. In addition, enable two-factor authentication (2FA) whenever available.
  • Invest in Your Safety: Buying the best antivirus for Windows 11 is key for your online security. A high-quality antivirus like Norton, McAfee, or Bitdefender will safeguard your PC from various online threats, including malware, ransomware, and spyware.
  • Be Wary of Phishing Attempts: Be cautious when receiving suspicious communications that ask for personal information. Legitimate businesses will never ask for sensitive details via email or text. Before clicking on any links, ensure the sender's authenticity.
  • Stay Informed. We cover a wide range of cybersecurity topics on our blog. And there are several credible sources offering threat reports and recommendations, such as NIST, CISA, FBI, ENISA, Symantec, Verizon, Cisco, Crowdstrike, and many more.

Happy surfing!

Frequently Asked Questions

Below are the most frequently asked questions.

Can two devices have the same IP address?

Yes and no. Two devices within the same network can’t have the same IP address – it would be like having two houses with the same address in one neighborhood. However, the same IP address can be assigned to two different devices on different networks. This is especially true for private IP addresses that are only unique within their local network.

Is it dangerous if someone knows my IP address?

While it’s not ideal for everyone to know your IP address, it’s not immediately dangerous. Someone with your public IP address can see your public internet information, such as your ISP and approximate location, but they can’t access your personal data. However, to maintain security, it’s best to keep your IP address private when possible.

Can my IP address be traced back to me?

Your IP address alone can’t identify you, but when combined with other information, it can potentially lead back to you. Your ISP, for example, could match your IP address with your account. But this information is protected by privacy laws and typically isn’t accessible without legal action. Even so, it’s advisable to use the internet responsibly to ensure your safety and privacy.

Author: Tibor Moes

Author: Tibor Moes

Founder & Chief Editor at SoftwareLab

Tibor is a Dutch engineer and entrepreneur. He has tested security software since 2014.

Over the years, he has tested most of the best antivirus software for Windows, Mac, Android, and iOS, as well as many VPN providers.

He uses Norton to protect his devices, CyberGhost for his privacy, and Dashlane for his passwords.

This website is hosted on a Digital Ocean server via Cloudways and is built with DIVI on WordPress.

You can find him on LinkedIn or contact him here.

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