What is an SSID, and what is it used for?

Every time you open your device’s Wi-Fi settings, you see a list of network names. Each one of those is an SSID.

If you’ve ever wondered what SSID means and why it matters, this guide breaks it all down.

An SSID (Service Set Identifier) is the name your Wi-Fi router broadcasts so nearby devices can find and connect to it. When you choose Home_WiFi_5G or Coffeeshop_Guest in your Wi-Fi settings, you’re selecting an SSID.

Think of an SSID like a name tag at a networking event. Without it, your device wouldn’t know which network is which. SSIDs have a maximum length of 32 bytes (usually 32 characters) and can contain letters, numbers, and special characters. They’re case-sensitive, so MyWiFi and mywifi can appear as two separate networks.

SSIDs themselves don’t provide any security. They’re just the name of a network and are neither the wireless network itself nor your Wi-Fi password. Knowing your SSID doesn’t automatically give another person access to your network.

Your router brand plays some part in the name your SSID displays. Many branded wireless routers come with a default SSID, but these can be easily changed to avoid confusion from similar names. In addition, you can show some creativity when making an SSID.

There’s nothing wrong with funny or clever names like Tell_My_Wi-Fi_Love_Her or Drop_It_Like_Its_Hotspot, but remember that whatever SSID name you choose will be publicly visible.

SSID stands for Service Set Identifier. In everyday terms, “service set” refers to a group of wireless devices sharing the same network, and an “identifier” is something that distinguishes them.

In other words, your SSID is your Wi-Fi network name.

Most routers ship with a default SSID printed on a sticker on the bottom or side of the device. These default names usually combine the brand and a random string of alphanumeric characters.

Here are some default vs. custom SSIDs:

An SSID’s sole function is to tell Wi-Fi networks apart. Your router continuously broadcasts its SSID so nearby devices can detect it. Here’s the basic flow:

Once connected, your device saves the SSID so it can reconnect automatically the next time you’re in range. That’s why your phone can connect to your home Wi-Fi without asking every single time.

When a device or app asks you to “specify SSID,” it’s just asking you to type in the name of the Wi-Fi network you want to connect to. This usually happens because the network is hidden and doesn’t automatically appear in the list.

You can normally find your Wi-Fi network’s SSID by checking the router itself or looking in your specific device’s settings.

Find the router you want to connect to and look for a sticker on the bottom or back. It lists the router’s default SSID (often labeled “Network Name” or “SSID”) along with the default password. 

If someone has already changed the SSID, this label won’t reflect the current name.

If you can’t identify your SSID from the options above:

Changing your SSID is simple and takes just a couple of minutes:

After the change, all previously connected devices will need to reconnect using the new network name and password.

Most routers let you turn off SSID broadcasting, but it isn’t necessarily always a good idea.

What hiding does:

What hiding doesn’t do:

Hiding your network’s SSID may offer some obscurity, but it’s not a substitute for strong encryption and a good password. It can also create a hassle: every new device you bring home will need the SSID typed in manually.

SSIDs themselves don’t store sensitive data, but attackers can use them as part of a broader attack strategy. In fact, setting up a fake WAP (Wireless Access Point) is one of the most common types of hacks.

Here are two common methods malicious actors use to exploit SSIDs:

Anyone can name a Wi-Fi hotspot whatever they want, and SSIDs have no uniqueness requirement. In an evil twin attack, a hacker takes advantage of this by creating a hotspot with the same name as a trusted network you’ve used before, like Airport_Free_WiFi.

If you’ve connected to the real Airport_Free_WiFi network before, your device remembers that SSID. When it detects the attacker’s version, it thinks it’s the legitimate network and can reconnect automatically without prompting you. This is most common on open networks in airports, hotels, and coffee shops.

Once connected, the attacker can monitor your network traffic and intercept sensitive data like login credentials.

SSID spoofing is more targeted than evil twin attacks. Here, an attacker mimics a specific network, such as your company’s Wi-Fi, to trick users into connecting and handing over login credentials.

You can help protect yourself from spoofing by:

Two networks in the same area can have identical SSIDs. This problem is surprisingly common, especially in apartment buildings where multiple tenants use the same ISP and router model.

When your device disconnects and tries to reconnect, it typically picks the network with the stronger signal. If both networks use different passwords, your device will simply fail to connect and prompt you to re-enter credentials. That’s annoying, but basically harmless.

The real risk comes when two SSIDs share the same name, and one is an open network that doesn’t require a password. Your device could connect to the wrong one without you noticing. If the connected network was set up as part of an evil twin attack, your data could be at risk.

Thankfully, there’s a practical solution for most cases. Give your home network a unique SSID to instantly solve any confusion.

Understanding what and SSID is helps you manage and secure your Wi-Fi network better. But your SSID is only one piece of the puzzle.

Whether you’re at home or connecting to public Wi-Fi at a hotel or café, a VPN encrypts your internet traffic so that no one on the same network can see what you’re doing online. Surfshark works across unlimited devices with a single subscription, so every phone, laptop, and tablet can stay protected whether you’re at home or on the go.