How to find the Wi-Fi password on a D-Link 2640U router: all working methods

I forgot my home Wi-Fi password, and it's on the router case. D-Link DIR-2640U Is the data sticker worn off or missing? This situation is familiar to many, especially if the device was set up a long time ago or was purchased second-hand. Fortunately, there are several ways to restore network access, and most of them don't require any specialized knowledge.

In this article we will look at all current methodsHow to find out the Wi-Fi password D-Link 2640U — from simply viewing the web interface to resetting settings and using alternative tools. Important: Some methods require physical access to the router or connected devices, so be sure to have an Ethernet cable ready or check the list of saved networks on your smartphone or laptop.

If you rent a place or use a router from a provider, Before resetting the settings, check with the owner or technical support to make sure that additional services (IP-TV, static IP, etc.) are not linked to the device.Otherwise, you may need to set it up again after the reset.

1. Check the sticker on the router body

The quickest way is to inspect the device itself. On the bottom or back panel. D-Link DIR-2640U There is usually a sticker with factory data, which indicates:

• 🔹 SSID (network name) - by default often matches the model (for example, DLink-2640U-XXXX)
• 🔑 Password/Key (password) — a combination of 8+ characters (numbers, letters, sometimes hyphens)
• 🌐 IP address to enter the control panel (usually 192.168.0.1 or 192.168.1.1)

If the sticker is still there but the text is blurry, try shining a flashlight on it at an angle or taking a photo with a zoomed-in lens. Sometimes the password is in the following format: WPA2-PSK - this is the security key for connection.

⚠️ Attention: If the router has already been configured (for example, by a provider), the factory password is on the sticker will not workIn this case, proceed to the following methods.

2. View the password through the router's web interface

If you have access to the control panel D-Link 2640UYou can find out your current Wi-Fi password in just 2 minutes. To do this:

1. Connect to your router via cable (recommended) or Wi-Fi (if your device is already online).

2. Open your browser and type in the address bar 192.168.0.1 or 192.168.1.1If the IP address is not suitable, check it using the command line:

   ipconfig (for Windows)
   ifconfig (for macOS/Linux)

   Look for the line Main gateway - this is the address you need.

3. Enter your username and password to log in. The default is:

   • 👤 Login: admin
   • 🔐 Password: admin or an empty field

If the data has changed, try combinations admin/password or admin/1234.

Go to the section Wi-Fi → Security Settings (or Wireless → Security (in the English version). The password will be specified in the field WPA/WPA2 key or PSK Password.

In some firmware D-Link The path may vary. If you can't find the section, use the settings search (the magnifying glass icon at the top of the screen) and search for "password."

Check the Ethernet cable connection|Reboot the router using the button on the case|Try a different browser (Chrome, Firefox)|Disable VPN/proxy|Reset the router settings (see section 4)

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3. Password recovery via connected devices

If at least one device (laptop, smartphone, tablet) is already connected to the Wi-Fi network D-Link 2640U, the password can be retrieved from its settings. Let's look at options for different operating systems.

🖥️ Windows 10/11

1. Open Settings → Network and Internet → Wi-Fi.

2. Click Managing known networks and select your network.

3. Click Properties → scroll to the field Network security key.

4. Check the box Show entered characters — the password will become visible.

📱 Android

On smartphones with Android 10+ Viewing the password requires superuser rights (root). You can try without them:

• 🔄 Reconnect to the network and enter a new password (if the router supports it) WPS).
• 📋 Use apps like WiFi Password Viewer (requires root).

🍎 macOS / iOS

On Mac open Programs → Utilities → Keychain, find the network name and double-click it. Check the box Show password and enter your account password.

On iPhone/iPad It is impossible to view the password without jailbreak, but if the device is connected to the network, it can be share through Settings → Wi-Fi → ⓘ → Password (requires iOS 11+).

⚠️ Attention: If the network is configured via WPS (button on the router), the password may not be saved on devices. In this case, use the web interface or reset method.

4. Reset the router to factory settings

If the previous methods did not work, there remains hard reset (hard reset). This will return the router to factory settings, including resetting the Wi-Fi password to the value on the sticker. Instructions:

1. Find it on the back panel D-Link 2640U a small hole with an inscription Reset or RST.

2. Take a paperclip/toothpick, press and hold the button 10-15 secondsuntil the indicators start flashing.

3. Release the button and wait for the reboot (1-2 minutes).

4. Connect to the network with the factory name (see sticker) and password.

After the reset you will need reconfiguring the Internet (data entry from the provider). If the router was issued by the provider (for example, Rostelecom or Beeline), connection parameters can be specified in the contract or personal account.

What should I do if the Internet doesn't work after a reset?

After a hard reset, the router loses its connection settings to the ISP. Here's what you need to do:

1. Go to the web interface (192.168.0.1).

2. Go to the section Network → WAN (or Internet).

3. Select the connection type (usually PPPoE, Dynamic IP or Static IP).

4. Enter the login/password from the provider (specified in the contract).

5. Save the settings and reboot the router.

If you don't know your connection type, check with your provider's technical support.

5. Alternative methods (for advanced users)

If standard methods don't help, you can try:

• 🔧 Connection via WPS: Click the button WPS on the router (usually 2-3 seconds), then select the network on the device and connect without a password. This method works if WPS isn't disabled in the settings.
• 📡 Wi-Fi scanner: Apps like Wifi Analyzer (Android) or NetSpot (Windows/macOS) may reveal weaknesses in network security, but will not display the password.
• 💻 Telnet/SSH: If you have access to the router console, you can try the command:

  cat /etc/config/wireless | grep 'key'

  But this method requires knowledge of Linux and may damage the device.

⚠️ Warning: Using Wi-Fi hacking programs (eg. Aircrack-ng) illegally and may result in device blocking or legal consequences. We do not recommend such methods.

6. How to protect your password from future loss

To avoid this problem again, follow these simple rules:

• 📝 Save your password in a safe place: a cloud service (Google Keep, Evernote), a password manager, or a paper notebook.
• 🔄 Update your password regularly (once every 3-6 months), especially if guests connect to the network.
• 🔐 Use complex combinations: at least 12 characters with numbers, capital letters and special characters (e.g. Green$Tree77!WiFi).
• 📋 Take a photo of the sticker from the router and save the photo in an encrypted archive.

If the router is used in an office or rented accommodation, Change the factory admin password (admin/admin) to a more secure one. This will protect your settings from unauthorized access.

FAQ: Frequently Asked Questions About the D-Link 2640U Wi-Fi Password

Is it possible to find out the Wi-Fi password without access to the router?

Yes, if you have a device that has previously connected to this network. Windows The password can be found in the network settings, macOS - via Keychain, Android without root rights - only if the router supports it WPS.

If no device is connected and there is no physical access to the router, recover the password impossible by legal methods.

What should I do if my router doesn't provide internet access after a reset?

After a hard reset (Reset) the router is reset to factory settings, including connection parameters to the ISP. You need to:

1. Check with your provider for the connection type (PPPoE, Dynamic IP etc.) and authorization data.
2. Login to the web interface (192.168.0.1) and enter them in the section Network → WAN.
3. Save settings and reboot the router.

If your ISP uses MAC address binding, you may need to clone it (section MAC Clone).

How do I change the Wi-Fi password on a D-Link 2640U?

To change your password:

1. Go to the web interface (192.168.0.1, login/password admin).
2. Go to Wi-Fi → Security Settings.
3. In the field WPA/WPA2 key Enter a new password (minimum 8 characters).
4. Save settings (Apply or Save).

After changing the password, all devices will be disconnected from the network and will need to be reconnected with the new password.

Why doesn't the router accept the factory password from the sticker?

This means the router settings have already been changed. Possible causes:

• The provider reconfigured the device upon connection.
• The previous owner (if the router is used) changed the password.
• The firmware was updated with changes to factory settings.

In this case, the password can only be recovered through web interface (if you know the admin's details) or reset.

Is it possible to recover the password via the D-Link app?

Official app D-Link WiFi (available for Android And iOS) allows you to control the router, but does not show the current Wi-Fi passwordThrough it you can only:

• View connected devices.
• Change network settings (including password).
• Update firmware.

To use the app, your router must be pre-configured and connected to your network.