How to Check Who's Connected to Your Wi-Fi Router: A Complete Guide

Have you noticed your internet is slower than usual? Or perhaps you suspect someone is using your Wi-Fi without permission? In today's world, with the number of connected devices in the home growing every year (smartphones, tablets, smart speakers, cameras), network monitoring is becoming critical. According to Kaspersky, more than 30% of users have experienced an unauthorized connection to their home network at least once.

The problem isn't just about "free" internet for neighbors. Outside devices can slow down, consume traffic (relevant for tariffs with a limit), and in the worst case, be used for cyberattacks on your network. For example, attackers can use vulnerable devices to spread viruses or steal personal data. In this article, we'll look at All current methods for checking connected devices, including hidden methods that not everyone knows about.

1. Checking via the router's web interface (universal method)

The most reliable and accurate way is to log into your router's control panel. This method works on everyone models, from budget ones TP-Link TL-WR840N to the flagship ASUS RT-AX88UThe main thing is to know your router's IP address and login information.

To open the web interface:

• 🌐 Enter one of the standard IP addresses in your browser's address bar:
  • 192.168.0.1 (most often in D-Link, Zyxel)
  • 192.168.1.1 (standard for TP-Link, ASUS, Mercusys)
  • 192.168.8.1 (for some models Huawei)
• 🔑 Enter your login and password (usually admin/admin, if you haven't changed it). On some routers (for example, Keenetic) the password is indicated on the sticker below.
• 📊 Find the section with connected devices. Its name depends on the firmware:
  • DHCP → DHCP Clients (TP-Link)
  • Local Network → Devices (ASUS)
  • List of hosts (Zyxel Keenetic)

Check your connection to the router via cable or Wi-Fi|Reboot the router using the button on the case|Reset the settings using the Reset button (hold for 10 seconds)|Try a different browser (Chrome, Firefox, Edge)|Make sure the VPN is disabled-->

The table below shows an example of what the device list looks like in different firmware versions:

⚠️ Attention: If you see unknown MAC addresses in the list of devices with manufacturers like Xiaomi, Samsung or AppleThis doesn't always mean a hack. Smart bulbs, speakers, or guest gadgets may be connected to the network. Check all your devices first.

2. Using mobile applications from the manufacturer

If accessing the web interface is inconvenient, most modern routers support management through official apps. This is especially important for users Mi Wi-Fi (from Xiaomi), Tenda or Mercusys, where mobile software is often more functional than the web version.

Application examples:

• 📱 TP-Link Tether — for routers TP-Link (Archer, Deco) Displays a list of devices that can be blocked.
• 📱 ASUS Router — for devices ASUSThere are graphs of traffic consumption by device.
• 📱 Mi Wi-Fi — for routers Xiaomi. Can notify about new connections.
• 📱 Keenetic — an application of the same name with advanced network analytics.

Typically, these applications have a devices section on the home screen or in the "Local Network" menu. Some programs (for example, ASUS Router) they even show connection history, which helps to identify "guests" who connected at night.

⚠️ Attention: Mobile applications sometimes require the creation of a manufacturer account (for example, TP-Link ID or ASUS Account). If you do not want to register, use the web interface.

3. Checking via the command line (for advanced users)

If you have access to a computer running Windows or LinuxYou can check connected devices without logging into the router. This method is useful when you don't have access to the control panel (for example, if you're visiting someone and want to discretely check the network).

For Windows:

1. Open Command line (Win + R → enter cmd → Enter).
2. Enter the command:

   arp -a

   It will display an ARP (Address Resolution Protocol) table with the IP and MAC addresses of all devices on the local network.

3. To see only active connections, use:

   net view

   or for more detailed information:

   nbtstat -a [IP address]

For Linux/macOS:

1. Open Terminal.
2. Enter the command:

   nmap -sn 192.168.1.0/24

   (replace 192.168.1.0/24 to your subnet, if it is different).

3. For a detailed port scan (helps identify suspicious devices):

   nmap -O 192.168.1.100

   (Where 192.168.1.100 — IP of the suspicious device).

How to determine the manufacturer of a device by MAC address?

The first 6 characters of the MAC address (OUI) indicate the manufacturer. For example:

- B8:27:EB — Raspberry Pi

- 78:31:C1 — Apple

- 5C:CF:7F — Samsung

You can check on sites like MAC Vendors or via the command in Linux:

grep [first 6 characters] /usr/share/nmap/nmap-mac-prefixes

This method requires basic knowledge of networks, but provides the most complete information. For example, with the help of nmap You can detect devices that are hidden in the router's web interface (for example, those connected via cable or with DHCP disabled).

4. Special programs for network monitoring

If standard methods don't work, you can use third-party utilities. They offer advanced features, such as traffic monitoring, device blocking, and notifications about new connections.

Top 5 programs for Wi-Fi network analysis:

• 🖥️ Wireless Network Watcher (from NirSoft) is a free utility that scans your network and displays all connected devices by MAC address, IP address, and manufacturer. It works without installation.
• 🖥️ Angry IP Scanner — scans a range of IP addresses and identifies active hosts. Supports plugins for in-depth analysis.
• 🖥️ Fing - there are versions for Windows, macOS, Android And iOSShows devices, open ports, and even vulnerabilities.
• 🖥️ GlassWire — monitors traffic in real time and alerts you to new devices. It also has a blocking feature for suspicious devices.
• 🖥️ Advanced IP Scanner — a simple program with the ability to remotely control devices (for example, shutting down a PC on a network).

Example of work Wireless Network Watcher:

1. Download the program from the official website NirSoft.
2. Launch WNetWatcher.exe (no installation required).
3. Click Start Scanning - after a few seconds a list of all devices on the network will appear.
4. The program will automatically detect the manufacturer by MAC address and show the time of first detection.

Wireless Network Watcher|Angry IP Scanner|Fing|GlassWire|I use the router's web interface-->

⚠️ Attention: Some antiviruses (for example, Avast or Kaspersky) may block network scanners, considering them potentially dangerous. Add the program to the exceptions list if the scan doesn't start.

5. Checking via the "Guest Network" function

If your router supports guest network (For example, ASUS AiMesh, TP-Link OneMesh or Keenetic), you can use it to detect unauthorized devices. The method works like this: all your trusted devices connect to the main network, leaving the guest network empty. If devices appear on the guest network, it's a sure sign of an unauthorized connection.

How to set up:

1. Log in to the router's web interface.
2. Find the section Guest network (or Guest Network).
3. Enable the guest network with a unique name (SSID) and password.
4. Disable guest devices' access to the local network (option AP Isolation or Access to the local network → Ban).
5. Periodically check the list of connected devices on the guest network.

Advantages of the method:

• 🔍 Clear division trusted and suspicious devices.
• 🛡️ The guest network usually has limited access to the router settings.
• 📡 Can be customized separate password for guests and change it more often.

6. Traffic and network speed analysis

Sometimes foreign devices are not visible in the list of connected devices, but their presence can be detected by abnormal trafficFor example, if the network is actively used at night when everyone is asleep, this is a cause for concern.

How to check:

• 📊 In the router's web interface, find the section Statistics, Traffic or MonitoringFor example, in Keenetic This Internet → Traffic Statistics.
• 📈 Pay attention to usage peaks. If your traffic is 50 Mbps at 3 AM, someone is definitely using your Wi-Fi.
• 🔍 Check which devices are consuming the most traffic. In routers ASUS This can be done in the section Adaptive QoS → Traffic Monitoring.

Signs of an unauthorized connection:

• 🚨 Sharp drop in speed at the usual time.
• 🌍 Active traffic use when all home devices are turned off.
• 🔄 Unknown external IP addresses in the router logs (section System log or Logs).

If you detect suspicious activity but don't see any unknown devices in the list, it's possible:

• 🕵️‍♂️ Someone connected via cable (check the physical ports of the router).
• 📡 In use hidden network (in the router settings, disable the option Hide SSID).
• 🔄 The device is connecting periodically (set up notifications in the router app).

7. How to block unauthorized devices

If you have detected an unauthorized connection, you need to turn off And blockHere are the step-by-step instructions:

Method 1: Blocking by MAC address

1. In the router's web interface, find the section Security or MAC filtering.
2. Add the MAC address of the suspicious device to the blacklist.
3. Save the settings and reboot the router.

Method 2: Change your Wi-Fi password

• 🔑 Go to Wi-Fi Settings → Security.
• Select encryption type WPA2-PSK or WPA3-PSK.
• Create a complex password (at least 12 characters, with numbers and special characters).
• 📱 Don't forget to update your password on all your devices.

Method 3: Disabling WPS

• 🔌 Function WPS (Wi-Fi Protected Setup) is vulnerable to brute-force attacks. Disable it in your router settings.
• In some models (TP-Link, D-Link) WPS is enabled by default.

Method 4: Time limit

• ⏰ In routers ASUS And Keenetic can be customized access schedule to Wi-Fi. For example, turn off the internet from 12:00 AM to 6:00 AM.
• This does not block the devices permanently, but it makes them more difficult to use.

⚠️ Attention: If unauthorized devices continue to appear after changing the password and blocking MAC addresses, your router may have been compromised at the firmware level. In this case, a full reset or a firmware update will be the only solution.

FAQ: Frequently asked questions about checking connected devices

Is it possible to check who is connected to Wi-Fi without access to the router?

Yes, but with limitations. You can:

• Use programs like Fing or Wireless Network Watcher on your PC/smartphone.
• View the list of devices in your phone's settings (on Android: Settings → Wi-Fi → Saved networks → [your network] → Connected devices).

However, without access to the router, you will not be able to block third-party gadgets.

How do I know if a device on the list is mine and not someone else's?

Compare:

• MAC address: The first 6 characters indicate the manufacturer (e.g. Apple, Samsung).
• Device name: often appears in the list (eg. iPhone-12-Pro or Mi-TV-4A).
• IP address: if it is static (assigned to your device in the router settings), it is your gadget.

You can also temporarily disconnect all your devices from Wi-Fi and see which ones remain in the list.

What should I do if unknown devices with Chinese MAC addresses appear in the device list?

These could be:

• Your smart devices (light bulbs Xiaomi, cameras Hikvision etc.).
• Neighbors' devices if you have a weak password or enabled WPS.
• Botnets (networks of infected devices) that connect for DDoS attacks.

Recommendations:

1. Check all your IoT gadgets.
2. Change your Wi-Fi password to a more complex one.
3. Turn it off WPS And Remote control in the router settings.

Can a router notify about new connections automatically?

Yes, but not all models support this feature. Notifications are available in:

• Routers Keenetic (via app or email).
• Some models ASUS (in the section Notifications).
• Firmware DD-WRT And OpenWRT (manually configured).

If your router doesn't have notification capabilities, use programs like GlassWire or Fing.

How to protect your Wi-Fi from future hacking?

Proven methods:

• 🔒 Use WPA3 instead of WPA2 (if the router supports it).
• 🔄 Change your Wi-Fi password every 3-6 months.
• 🚫 Turn it off WPS, Remote control And UPnP.
• 📋 Turn on MAC address filtering (although it can be bypassed).
• 🛡️ Update your router firmware to the latest version.
• 🌐 Create guest network for friends and smart devices.