Everyday Privacy

Private Wi-Fi Address: What It Is and When to Turn It Off

Every Wi-Fi device has a hardware address. If it stays the same, every network you join can recognize your device. A private Wi-Fi address changes it per network.

Last updated November 8, 2026 · By Harbor Privacy

Short answer: leave it on. Use Fixed for networks you return to, like home and work, and Rotating on public Wi-Fi you will not revisit. Turn it off only for a network that needs your real hardware address.

What It Is

Your phone has a hardware (MAC) address that identifies it on a network. Hotels, stores, and public hotspots can log it to recognize you each time you return, or to link your visits. A private address gives your phone a different, random address for each network, so it cannot be tracked across them.

How to Check or Change It

iPhoneOpen Settings, Wi-Fi, tap the info button next to a network, and look for Private Wi-Fi Address. Set it to Fixed or Rotating.

AndroidOpen the network's settings and look for Privacy, then use randomized MAC. It is usually on by default for new networks.

WindowsIn Network settings, use Random hardware addresses for a connection.

When to Turn It Off

Your home router uses a MAC filter that only allows known devices.
Parental controls or device names are tied to the hardware address.
A hotel or office network needs to register your device.
A fixed address is required for a static IP or a device list.

Turn it off for that one network only and leave it on elsewhere.

Fixed, Rotating, or Off

Fixed: your phone uses one private address for each network and keeps it. Home, work, and your usual cafe all still recognize you, but different networks cannot match you to each other.
Rotating (newer iPhones): the address changes periodically, so even one network cannot follow you over time. Choose this for public hotspots and places you do not return to.
Off: your phone shows its real hardware address. Use this only for networks that require it, such as a router with a MAC allowlist.

How to Tell It Is Working

On an iPhone, open Settings, General, About and note the Wi-Fi Address. Then open the network's info screen under Settings, Wi-Fi. With Private Wi-Fi Address on, the address shown for that network is different from the one in About. If the two match, the feature is off for that network.

What It Does Not Do

It does not hide your IP address or encrypt your traffic. A network can still see what you do on it. Use a VPN for that. See public Wi-Fi safety and how to hide your IP.

Common Questions

Is a private Wi-Fi address on by default?

On recent iPhones and Androids, yes for most networks. Check the setting on each network.

Why can I not connect after turning it on?

The network may filter by MAC address. Turn it off for that network.

Does it stop tracking completely?

No. It only prevents tracking by hardware address. Accounts, cookies, and your IP can still identify you.

What is the difference between Fixed and Rotating on iPhone?

Fixed keeps one private address per network. Rotating changes it periodically for extra privacy.

Does it affect my speed?

No.

What does “Private Wi-Fi Address is turned off for this network” mean?

Your device is using its real hardware address on that network, either because you turned the setting off for it or because the network needed it. Open the network’s info screen and switch Private Wi-Fi Address back on if you do not need the real address.

Should I use a private Wi-Fi address at home?

Usually yes, set to Fixed. Your router sees one consistent address, so device lists and parental controls keep working, while other networks cannot match your phone to your home. Turn it off at home only if your router filters by MAC address.

Is a private Wi-Fi address the same as MAC randomization?

Yes. Apple calls it Private Wi-Fi Address, Android calls it randomized MAC, and Windows calls it random hardware addresses. They all give your device a different address than its real hardware one.

PROTECT YOUR TRAFFIC ON ANY WI-FI

Harbor VPN encrypts everything on public networks. See Harbor VPN.