How to see who is connected to WiFi on your computer

Slow internet speeds or intermittent connection interruptions are often the first warning signs of unauthorized access to your network. In the digital age, Wi-Fi network Wireless networks have become the central hub of home and office spaces, connecting smartphones, smart TVs, video surveillance systems, and computers. However, the open nature of the wireless protocol makes it vulnerable unless modern encryption methods and strong passwords are used.

Router owners are often unaware that neighbors or hackers are using their connection to download heavy content or, worse, launching cyberattacks within the local network. Connection monitoring — this isn't just a way to identify freeloaders, but also a necessary security measure to protect personal data. Modern routers and specialized software allow for real-time monitoring of every device's activity.

In this guide, we'll detail how to see who's connected to your WiFi network on your computer using built-in Windows operating system tools, the command line, and your router's web interface. You'll learn how to distinguish your devices from others, block unwanted connections, and strengthen your wireless network security to prevent any future intrusions.

Analyzing activity via the Windows command line

The Windows operating system has powerful built-in network diagnostic tools that don't require third-party software. The fastest way to get basic information about who's on your local network is to use this utility. arp (Address Resolution Protocol). This method allows you to view a table of IP addresses and MAC addresses of devices with which your computer has communicated.

To run the analysis, you need to open the command line. Press the key combination Win + R, enter cmd and press Enter. In the window that opens, enter the command arp -aA list of all addresses accessed by your PC will appear on the screen. It's important to understand that you'll see not only active connections to the router but also cached entries.

⚠️ Attention: Team arp -a Shows only those devices with which your computer has already communicated or exchanged data packets. If a device is simply connected to WiFi and is silent, it may not appear in the list until it makes contact.

To "wake up" the network and get a more complete list, you can use the ping command to scan a range of addresses. However, a standard ping to a single address is a time-consuming process. More advanced users can run a ping loop for all possible addresses in a subnet to force a response from every host.

for /L %i in (1,1,254) do ping -n 1 -w 10 192.168.1.%i

After running this command (replace 192.168.1 to the first three octets of your IP address), please re-enter arp -aThe list will expand significantly, showing the actual IP and MAC addresses of all active devices within range. This is a basic but effective method. network audit.

Checking connections via the router's web interface

The most reliable and complete source of information about connected clients is the router itself. It distributes IP addresses via DHCP and knows about every device accessing the WiFi network. To access the control panel, open any browser and enter the gateway IP address, which is usually located on a sticker on the bottom of the router (often this is 192.168.0.1 or 192.168.1.1).

After entering your login and password (by default, often admin/admin) you will need to find the section related to the wireless network or client status. Depending on the router model (TP-Link, Asus, D-Link, Keenetic), the names may vary: “Wireless Statistics”, “Client List”, “DHCP Client List” or “Network Map”.

⚠️ Attention: Router interfaces are constantly being updated. If you can't find the menu item you need, check the official documentation from your model's manufacturer, as menu locations may change with new firmware versions.

In the client list, you'll see MAC addresses, IP addresses, and sometimes device names. The user's task is to identify each device. Modern routers often automatically retrieve names (for example, "iPhone-Alex" or "Samsung-TV"), which greatly simplifies the process. If you see a device with the name "Unknown" or a MAC address, be wary.

📊 What brand of router do you have at home?

TP-Link

Asus

Keenetic

D-Link

Another

For ease of comparison, below is a table with typical sections in the interfaces of popular manufacturers:

Router brand	Section title	Menu location
TP-Link	Wireless Statistics	Wireless / Statistics
Asus	Network Map	Home / Network Map
Keenetic	Client list	My Networks and WiFi / Home Network
D-Link	Active Clients	Status / Active Clients

The web interface is the most convenient way to not only view but also manage access. You can instantly block unwanted users by changing MAC address filtering settings or simply changing the WiFi password, which will forcibly disconnect all clients.

Using specialized software for PC

If standard Windows tools aren't enough, and accessing your router settings each time is inconvenient, specialized network scanner programs can help. They provide more visual information, including the network card manufacturer (via MAC address), response time, and open ports. One of the most popular and functional utilities is Advanced IP Scanner.

This program is free, requires no installation (portable version), and scans your network in seconds. Once launched, it displays a list of all active devices, their IP, MAC address, manufacturer, and even allows you to open shared folders or device web interfaces with one click. It's the perfect tool for deep analysis local network.

Other useful utilities include WireShark (for professional traffic analysis, requires knowledge) and Angry IP ScannerHowever, for the common task of "who's using Wi-Fi," the functionality of simple scanners is sufficient. They help identify hidden devices that don't show up in the standard ARP cache.

☑️ Network security check

Install a network scanner (for example, Advanced IP Scanner)Run IP range scanCompare the list with known devicesBlock unknown MAC addresses on your router

Completed: 0 / 4

When using third-party software, it's important to download it only from the developers' official websites. There are many counterfeit versions of popular utilities online that may contain malicious code. Always check the digital signature of the executable file.

Identifying devices by MAC address

The most difficult part of monitoring is understanding which device owns which address. IP addresses are dynamic and can change, but MAC address (Media Access Control) is a unique physical identifier assigned to a network card by the manufacturer. It consists of 12 hexadecimal digits (e.g., 00:1A:2B:3C:4D:5E).

The first six characters of a MAC address (OUI – Organizationally Unique Identifier) ​​identify the hardware manufacturer. Knowing this prefix, you can easily determine whether the device is a Samsung phone, a Dell laptop, or a Xiaomi smart bulb. There are online OUI databases where you can enter the first three pairs of characters to retrieve the vendor name.

To make life easier, it's recommended to make a list of all your devices in advance. Walk around your house with Wi-Fi enabled on each device and write down their MAC addresses (you can find them in the "About Phone" or "Network" settings). This will take 10 minutes, but will save you hours of guessing "whose iPhone is this?"

What to do if the MAC address of an unknown device matches yours?

Some operating systems (iOS, Android) use a "Private WiFi Address" feature or MAC address randomization to protect privacy. In this case, the device will appear in the router under a random address different from its physical address. Disable this feature for home networks in the WiFi settings of the specific device if you want to always see its real address.

If you encounter a device whose manufacturer you don't recognize (for example, an unknown chipset), try disabling your devices one by one and see if the suspicious client disappears from the list. This elimination method allows you to accurately identify the "offender."

Methods of protection and blocking uninvited guests

Detecting an intruder is only half the battle. The key is to quickly block their access. The simplest, yet most drastic, method is to change your WiFi password. After changing the encryption key in your router settings (Wireless Security), all devices will be disconnected, and a new password will be required to reconnect. This is guaranteed to kick out all rogue users.

A more flexible method is MAC address filteringYou can create a "whitelist" (Allow List) in your router settings, adding only your devices. The router will only allow connections to those devices whose MAC addresses are on this list, ignoring all other connection attempts, even if the password is entered correctly.

⚠️ Attention: MAC address filtering is a reliable method, but it requires manual registration of each new device (for example, when friends come over). Be prepared to temporarily disable the filter or add new addresses manually.

It is also worth paying attention to disabling the function WPSThis technology allows you to connect to the network by pressing a button or using a PIN code, but it has known vulnerabilities that allow hackers to brute-force the password. In the router's menu, find the WPS section and set it to "Disable" or "Off."

Frequently Asked Questions (FAQ)

Can my neighbor steal my internet if I changed my password?

If your neighbor was already connected to your network, their device will automatically reconnect when a signal appears, using the saved password. Changing the router password will break this connection, and they will need the new key to reconnect. However, if the password was weak, it could have been "detected" and saved. Therefore, after changing the password, it is recommended to also disable WPS.

Does the number of connected devices affect internet speed?

Absolutely. The WiFi channel is shared between all active clients. If someone is downloading files via torrent or watching 4K videos, your surfing speed can drop to practically zero. Furthermore, a large number of devices puts a strain on the router's processor, which can cause lag even when the channel is under load.

How do you know if someone is hiding their MAC address?

An ordinary user can't "hide" their MAC address so that the router can't see it—without a MAC address, data exchange is impossible. However, there are programs that generate random MAC addresses (spoofing). In this case, you'll see the device, but its address will change every time it reconnects, making it more difficult to block. In this case, the only solution is to change the WiFi password.

Is it safe to use WiFi hacking software (like Aircrack-ng)?

Using such tools to check your own network is legal, but requires advanced technical knowledge. However, downloading such utilities from untrusted websites often results in your computer being infected with viruses. For the average user, it's safer to use legitimate network scanners and adjust router settings than to attempt to "hack" your network for the sake of checking.