In today's digital world, a wireless network has become as essential a resource as electricity or water. However, users often encounter internet instability, speed drops, and pages load with noticeable delays. The first and most common cause of such problems is the presence of uninvited guests on your local network. Neighbors hooked up to an open Wi-Fi hotspot or old devices you've forgotten exist can consume the lion's share of your bandwidth.
Understanding that, How to check the number of Wi-Fi connectionsMonitoring your network is a basic skill for home network administration. This process not only allows you to diagnose speed issues but also protect your personal data from potential interception by hackers. In this article, we'll cover all available monitoring methods in detail: from using built-in router interfaces to specialized mobile apps for in-depth diagnostics.
There are several levels of verification, from simply viewing a list of active clients in the router's web interface to using the command line for advanced users. Each method has its advantages and limitations. For example, the web interface provides complete control over security settings, while mobile apps are convenient for quick on-the-fly verification. It is important to understand, that the accuracy of the data depends on the type of equipment used and the firmware version.
⚠️ Important: If you find a device you can't identify, don't panic. First, check the MAC addresses of your devices, as some smartphones may be listed under the brand name rather than the model.
Checking via the router's web interface
The most reliable and informative way to find out who is using your network is to log into your router's control panel. This method doesn't require installing any additional software and provides access to the most up-to-date data in real time. First, you need to find the gateway IP address, which is usually located on a sticker on the bottom of the device (often this is 192.168.0.1 or 192.168.1.1). By entering this address in the browser's address bar, you will be taken to the authorization page.
After entering your login and password (by default this is often admin/admin(If you haven't changed them before), you need to find the section responsible for the wireless network. Depending on the manufacturer, this section may have different names: "Wireless," "Wi-Fi," "Status," or "Network Map." This is where the list of connected clients (Client List). In this list, you'll see MAC addresses, IP addresses, and often device names.
Interfaces vary significantly between manufacturers. For example, in routers TP-Link The information you need is often found in the menu "Wireless" → "Wireless Statistics". For devices ASUS This could be the main page or the Network Map section. Routers Keenetic Provide very detailed information in the "Client List" section, where you can immediately see the connection type and speed. If you see a device named "Unknown" or with a strange MAC address, this is cause for concern.
To help you compare the interfaces of various popular models, we've outlined their key features in the table below. This will help you navigate your device's menu more quickly.
| Router brand | Menu section | Item name | Blocking capability |
|---|---|---|---|
| TP-Link | Wireless | Wireless Statistics | Through MAC filtering |
| ASUS | Network map | Clients | Direct blocking |
| Keenetic | My Networks and Wi-Fi | Client list | Direct blocking |
| D-Link | Wi-Fi | Client list | Through filtration |
Using mobile applications for Android and iOS
If your computer access is limited or you want to check your network from your phone, specialized apps can help. They scan your local network and list all active devices. One of the most popular tools is the app FingIt is available for both Android, and for iOS and allows you to not only see the number of connections, but also determine the manufacturer of the device by its MAC address.
The principle behind these apps is simple: they broadcast requests to the network and analyze the responses. This allows you to see even devices that aren't actively networking but are in sleep mode. Furthermore, Fing, we can mention utilities such as Network Scanner or WiFi AnalyzerThey often provide more technical information, such as signal strength (RSSI) for each client.
However, it is worth remembering the limitations of mobile operating systems. In the latest versions iOS And Android Security measures have been strengthened, which may limit port scanning or the ability to obtain full information about neighboring devices without special permission. Therefore, the data in the app may differ slightly from the data in the router's web interface.
Analysis via the Windows command line
For users who prefer not to install unnecessary software and have access to a Windows PC, there's a built-in tool: the command line. This method requires minimal syntax knowledge but produces quick results. It's especially useful when you need to quickly obtain a list of IP and MAC addresses without the graphical overhead.
First, you need to open the command prompt. This can be done by pressing the following key combination: Win + R, by entering cmd and pressing Enter. In the window that opens, you need to enter the command arp -aThis command displays the ARP (Address Resolution Protocol) table, which contains mappings between IP addresses and physical MAC addresses of devices on the local network.
C:\Users\User>arp -a
Interface: 192.168.1.5 --- 0xb
Internet Address Physical Address Type
192.168.1.1 00-1a-2b-3c-4d-5e dynamic
192.168.1.15 a4-5e-60-12-34-56 dynamic
192.168.1.20 88-99-aa-bb-cc-dd dynamic
In the command output you will see a list of addresses. Address 192.168.1.1 (or your gateway) is the router itself. The other addresses are devices with which your computer has recently exchanged data. Dynamic The entry type indicates whether the device is active or was recently active. Static entries typically refer to the computer itself or manually entered routes.
What do the statuses in the ARP table mean?
The "dynamic" status indicates that the entry was acquired automatically via the ARP protocol and may disappear after some time of inactivity. The "static" status indicates a manually added or system-defined entry that is not automatically deleted.
Specialized software for deep scanning
When standard tools are not enough and professional traffic analysis is required, PC programs such as Advanced IP Scanner or WireSharkThese tools allow you not only to view the list but also to conduct a deep diagnosis. Advanced IP Scanner It works fast, does not require installation (portable version) and can scan IP address ranges, identifying all active hosts.
Program WireShark — is a tool for professionals, allowing them to intercept and analyze data packets. It allows one to see not only the connection status but also the nature of the traffic generated by the device. However, for the average user simply wanting to check the number of connections, this method may be excessive and difficult to master.
Using such software is especially relevant in office networks or large homes, where dozens of devices are connected. Automated scanners can create network maps, identify open ports, and even the operating system versions of connected devices. This helps identify vulnerabilities, such as old printers or cameras with factory-set passwords.
⚠️ Warning: Using traffic sniffers (like WireShark) on other people's networks or to intercept confidential data (passwords, correspondence) is illegal and punishable by law. Use these tools only on your own network for diagnostic purposes.
How to identify unknown devices
Once you've received a list of connected devices, you'll be faced with the task of figuring out which ones are which. A MAC address consists of 12 hexadecimal characters, separated by colons or hyphens. The first six characters (the first three bytes) are called the OUI (Organizationally Unique Identifier) and identify the network card manufacturer. Knowing this code, you can easily identify the device's brand.
There are many online services for decoding MAC addresses, but it can often be done visually if you know the main prefixes. For example, addresses starting with 00:1A:2B, often belong Tp-Link, A B8:27:EB - this is typical for devices Raspberry PiIf you see a device named "Android" or "iPhone" in the list, but everyone in your household is away at the time, this is a clear sign of unauthorized access.
It's also worth paying attention to the number of connections. If you have five smartphones, two laptops, and one TV in your home, and the router shows 15 active clients, then there's definitely a problem. Often, the "extra" connections are smart home devices (light bulbs, outlets) that were forgotten, or guest gadgets that connected automatically.
Network protection and blocking of intruders
Detecting a rogue connection is only half the battle. The main goal is to ensure security. The simplest and most effective way is to change your Wi-Fi password. Once the password is changed, all devices will be disconnected, and only those with the new key will be able to connect. It is recommended to use a complex password with mixed-case letters, numbers, and special characters.
A more advanced method is to use MAC address filteringYou can create a "whitelist" (Allow List) in your router settings, adding only known addresses. All other devices, even with the password, will be unable to connect. However, this method is labor-intensive: every time you buy a new phone or have guests over, you'll have to manually enter their MAC addresses into the settings.
Don't forget about your guest network either. Many modern routers allow you to create a separate guest SSID. Guests can connect to it and access the internet, but they won't see your personal computers, printers, or NAS storage. This is the perfect compromise between hospitality and security.
☑️ Wi-Fi Security Checklist
Frequently Asked Questions (FAQ)
Can my neighbor steal my internet if I changed my password?
If you changed your password to a strong one and didn't share it with anyone, they won't technically be able to reconnect. However, if a neighbor has physical access to your router (for example, if there's an open switchboard in the entryway), they can reset the device using the Reset button and reconfigure it. There's also a risk if one of your devices has the old password and has been hacked.
Why are there devices named "Unknown" in the client list?
This is normal. Many devices (especially IoT gadgets, smart bulbs, and sensors) don't transmit their friendly hostname when connecting, or the router can't recognize it correctly. In this case, use the MAC address and manufacturer (the first digits of the address) as a reference.
Does the number of connected devices affect internet speed?
Yes, it does have a direct impact. The Wi-Fi channel is shared among all active users. If one neighbor or device starts downloading large files or watching 4K video, the speed on other devices will drop. Furthermore, a large number of simultaneous connections puts a strain on the router's processor, which can cause it to freeze.
How often should I check my connection list?
It's recommended to perform a preventative check once a month or any time you notice an unexplained drop in internet speed. Also, be sure to check the list after a party with guests or if you've temporarily shared your password with friends.
What should I do if I can't access my router settings?
If standard addresses 192.168.0.1 or 192.168.1.1 If the files don't open, the router's IP address may have changed. Check the gateway address in your computer's network connection settings (command ipconfig The command line will show "Default gateway"). If this doesn't help, you'll have to reset the router to factory settings (press the Reset button).