What an SSID is

SSID stands for Service Set Identifier. It's the human-readable name a Wi-Fi access point announces in small broadcast packets called beacons, several times per second. Your phone collects those beacons and shows the names as the list of available networks.

A few technical points that come up in practice:

  • Length: up to 32 bytes. Plain letters and numbers are safest; emoji and accented characters take multiple bytes and some older devices display them incorrectly.
  • Case-sensitive: "HomeNet" and "homenet" are different networks.
  • Not unique: two neighbors can use the same SSID. Devices tell access points apart by their BSSID, which is the radio's MAC address.
  • Not a password: the SSID is public. The Wi-Fi password (the WPA2/WPA3 passphrase) is the secret.

Where to find your SSID

  • On the router label: the default network name and Wi-Fi password are usually printed on a sticker on the bottom or back, often with a QR code. ISP gateways from Xfinity, Spectrum, AT&T, Verizon and others follow this pattern.
  • On a connected device: the network name shown as connected in your Wi-Fi settings.
  • In the router's admin page or app: under Wireless, Wi-Fi or WLAN settings.

Why default SSIDs look the way they do

Manufacturers and ISPs generate a default name so each device works out of the box and neighbors with the same model don't collide. Typically it's a brand or ISP name followed by a few characters derived from the device's serial number or MAC address. That's practical, but it also advertises what hardware you use.

Some ISP gateways also broadcast extra networks you didn't create. Xfinity gateways, for example, can broadcast the xfinitywifi public hotspot, which is kept separate from your private network; Xfinity lets account holders turn it off.

How to change your SSID

  1. Log in to your router's admin page or app (see how to log in to your router).
  2. Open Wireless, Wi-Fi or WLAN settings. On app-managed gateways and mesh systems this is usually under Wi-Fi or Network settings.
  3. Edit the Network Name (SSID). If there are separate fields per band, decide whether to keep one name for all bands or separate names.
  4. While you're there, confirm security is WPA2-Personal or WPA3-Personal (or the WPA2/WPA3 mixed mode).
  5. Save. Everything disconnects; reconnect your devices with the new name.

If you also want a new password, see how to change your Wi-Fi password and do both at once so devices only need to reconnect one time.

Tips for a good network name

  • Unique enough that you'll recognize it among neighbors' networks.
  • No personal details: no surname, street address or apartment number.
  • No brand or ISP name, which reveals your hardware.
  • Nothing provocative; neighbors will see it.

Hidden SSIDs: why they don't help

Most routers have an option to stop broadcasting the SSID in beacons. It sounds like a security feature, but in practice:

  • The name is still sent in the clear whenever any device connects, so standard Wi-Fi tools reveal it quickly.
  • Your devices must actively call out for the hidden network wherever they are, which advertises its name in coffee shops and airports.
  • Smart TVs, printers, game consoles and smart-home devices frequently fail to connect or reconnect.

Leave the SSID visible and rely on WPA2/WPA3 with a strong password, current firmware, and WPS turned off if you don't use it.

Multiple SSIDs on one router

Per-band networks

Dual- and tri-band routers can use one name for all bands (with band steering) or separate names like HomeNet-2.4 and HomeNet-5. See 2.4 GHz vs 5 GHz for when splitting makes sense.

Guest network

A guest network gives visitors internet access while keeping them away from your computers, NAS and printers. Give it its own password and change it occasionally.

IoT network

Many current routers and mesh systems offer a separate network for smart-home devices, often 2.4 GHz only and with compatibility-friendly settings. It keeps cheap gadgets apart from your laptops and phones and avoids band-steering setup problems.

Frequently asked questions

How do I find my Wi-Fi SSID?

On a device that's already connected, the SSID is simply the network name shown in your Wi-Fi settings. On Windows, click the network icon in the taskbar; on a Mac, click the Wi-Fi icon in the menu bar; on iPhone and Android, open Settings → Wi-Fi. If you've never changed it, the default SSID and Wi-Fi password are usually printed on the label on your router or gateway, sometimes next to a QR code you can scan to join.

Does changing my SSID improve security?

Somewhat, indirectly. The name itself isn't a secret, but a default name like the router brand plus a few characters tells anyone nearby what equipment you use, which makes it easier to look up known weaknesses or default settings for that model. Changing it is worthwhile. What actually protects your network is WPA2 or WPA3 encryption with a long, unique password and up-to-date router firmware. Avoid names that include your full name, apartment number or address.

Should I hide my SSID?

Generally no. A hidden network still transmits its name whenever a device connects, so free tools reveal it within minutes. Meanwhile, your phones and laptops have to keep calling out for the hidden name everywhere you go, which can leak it in public places, and some devices (smart TVs, printers, smart-home gear) struggle to connect at all. Use strong WPA2/WPA3 security instead.

Can I have more than one SSID on my router?

Yes. Most routers support several: a separate network per band (2.4, 5 and 6 GHz), a guest network isolated from your main devices, and on many models a dedicated IoT network for smart-home gear. Each can have its own name, password and security level. Too many SSIDs on the same radio adds some overhead, so keep it to the few you actually use.

What happens to my devices if I change the SSID?

Every device treats the new name as a different network, so they all disconnect and you have to reconnect each one with the password. Smart-home devices often need to be re-added through their app. A related trick: when you replace a router, giving the new one the exact same SSID and password (and the same security type) as the old network lets most devices reconnect automatically.