How to know if your neighbours are using your WiFi

Your home WiFi should be smooth, uninterrupted, and preferably speedy as heck. But if your connection suddenly feels sluggish, devices keep dropping, or your router lights look busier than usual, it’s natural to wonder:

“Are my neighbours using my WiFi… without asking?”

While accidental connections do happen, especially if your password isn’t properly configured, straightforward unauthorised access (sneaky, sneaky) is a real possibility. The good news? It’s easy to check, secure your network, and reclaim your bandwidth.

We explain how to spot the signs, confirm what’s really going on, and protect your connection from anyone outside your home.

Jump to a section…

• Signs someone might be on your WiFi
• How to confirm if someone is using your WiFi network
• How to block neighbours (or anyone) from using your WiFi
• Could someone steal more than your WiFi?
• How to keep your home WiFi completely secure

First signs someone might be on your WiFi

These red flags don’t guarantee someone’s logged in without permission – but they’re very much worth investigating.

1. Your internet suddenly slows down

If your internet speed has noticeably dipped, especially at odd hours, an extra device (or a few) might be consuming bandwidth. Streaming, gaming, and big downloads from unexpected devices can cause spikes you’ll feel instantly.

2. Your router feels unusually busy

Most modern routers have blinking lights to show activity. If you notice constant flashing even when your devices are idle, it could be a device you don’t recognise.

3. Devices disconnect or buffer frequently

If your connection behaves as if it’s overloaded, but your own usage hasn’t changed, that’s a solid sign your WiFi network might be stretched by extra, uninvited users.

4. You spot a device you don’t recognise on your network

This one’s the smoking gun – and we’ll show you how to check for it shortly.

How to confirm if someone is using your WiFi network

Now that we have our suspicions, let’s look at how to confirm them before going all SWAT-team (or just tightening your own ship – either way, we won’t judge). Here’s what to do:

1. Log in to your router’s web interface 

Every router has a page you can access to change settings. To get to it, open a web browser and type your router’s login address into the address bar. 

Most routers use something like 192.168.1.1 or 192.168.0.1 – but if you’re not sure, just Google your router model followed by “login address” and it will show you the correct one. 

Once you enter the address, you’ll be asked for a username and password. This is usually printed on a sticker on your router.

Once you’re in router settings, go to the Connected Devices, LAN, or Device List section. You’ll see a list of every device currently using your WiFi.

Look for red flags like:

• Unknown device names (e.g., “Android-254618”)
• Suspicious or duplicated MAC addresses
• More devices connected than you remember connecting
• Devices showing active traffic when nothing in your home is online
  

This tells you very quickly whether someone else is hitching a ride with your internet provider.

2. Check your router app

Many modern routers come with smartphone apps that display all connected devices in plain English – no guesswork or intimidating menus.

Some apps even let you block devices, pause WiFi, or receive alerts when a new device joins.

This is the easiest way for non-technical users to keep tabs on their wireless network.

3. Change your WiFi password and refresh the device list

If you’re unsure which devices are yours, this super simple method is foolproof:

Change your WiFi password

• Reconnect only your known devices
• Check the device list again
  

If a mystery device pops back up, you’ve found your culprit – and your network is now locked down, so your local WiFi thieves won’t gain access again (unless you made your new password 1234, in which case, you can’t be helped).

How to block neighbours (or anyone) from using your WiFi

Even if nobody is currently using your network, you should take the opportunity to lock down your WiFi properly. These steps protect your speeds AND keep your data safe.

1. Create a strong, unique WiFi password

Weak passwords are the #1 reason people manage to sneak onto someone else’s network. If your admin password is something like “password123”, “wifi2023”, or your surname, you’re essentially leaving the front door wide open.

If this intimidates you, worry not, we’ve written a guide just for you showing how to create a strong password.

2. Use WPA3 security (or WPA2 if your router is older)

Never leave your network set to “Open” or “WEP”.

If your WiFi is set to Open, anyone in range can join without a password. If it’s set to WEP, it might look protected, but it’s basically security theatre at this point.

WEP is an old encryption standard that’s been broken for years, and it can be cracked in minutes using readily available tools. That means someone doesn’t need to be a “hacker”; they just need a laptop and a bit of patience.

What you want instead is:

• WPA3: the newest and most secure WiFi encryption standard. It does a better job of protecting your password, makes it much harder to access your WiFi with brute-force, and generally keeps your network far more resistant to casual snooping.

• WPA2 (AES): still a solid option if your router (or some older devices) can’t handle WPA3 yet. The key part is AES. If you see WPA2 options like “TKIP”, avoid them.

Here’s how to enable WPA3 encryption.

3. Set up a guest network

This is especially useful if friends and family regularly use your WiFi

A guest network:

• Keeps visitors away from your main devices
• Prevents accidental sharing
• Keeps your main password private
  

Tip: We have a step-by-step guide on how to set up a guest network at home.

4. Turn off WPS

WPS (Wi-Fi Protected Setup) simplifies connecting to your internet by bypassing the need to enter a password. 

WPS is convenient… and unfortunately very easy to exploit. Even a neighbour with basic knowledge can break in if WPS is enabled, so switch it off in your router settings for some extra security.

5. Regularly check connection logs

Make it a habit to view your connected device list once a month.
 

It only takes a minute, and it helps you spot unfamiliar devices early – before they start draining your bandwidth or poking around where they shouldn’t.

Could someone steal more than your WiFi?

Yes, and this is where things get more serious.

If someone is on your network, they could potentially:

• Access unsecured devices
• Intercept unencrypted data
• View shared files
• Use your IP address for illegal activity
• Monitor smart home devices
  

This is why securing your network isn’t just about avoiding slow speeds. It’s about protecting your privacy and home.

For a deeper look at staying safe online, read: How secure is your home internet?

How to keep your home WiFi completely secure

Here’s a quick, expert-approved checklist:

• Change your WiFi password every 6 – 12 months
• Don’t bandy your login credentials about
• Use strong encryption (WPA2 or WPA3)
• Disable WPS
• Hide your network SSID (optional but useful)
• Keep your router firmware updated
• Use separate networks for guests and smart devices
• Enable router-level firewalls
• Replace old routers (anything older than 7 years)
  

Do these and you’ll be more secure than 90% of UK households.

Your WiFi is yours – keep it that way

While sharing is caring, not everything should be given freely, and we believe that WiFi slots exactly into this second category. But it’s entirely possible for neighbours (or strangers) to use your WiFi without permission, whether that’s intentionally or by accident. But with the right checks and a few smart security steps, you can quickly take back control of your connection, protect your privacy, and keep those speeds fast and consistent.

A secure home network doesn’t have to be complicated. With strong passwords, guest networks, and a well-configured router, your WiFi stays yours, and only yours.

If you want fast, reliable broadband that’s built with security in mind, Airband has you covered. From encrypted connections to expert support, we make it simple to keep your home network safe, stable and entirely yours

Check out our broadband packages and Airband availability in your area and enjoy your WiFi all to yourself!