What changing your IP address actually does
Your IP address is the number that identifies your device on the internet — like a mailing address for data packets. When you change it, websites and services see requests coming from a different location or device identity. This is different from hiding your activity: changing your IP makes you appear as a different device on the network, but it does not encrypt what you send or make you anonymous.
Most home networks have two IP addresses in play. Your public IP address is what the outside internet sees — your internet service provider assigns this, and it identifies your whole household online. Your private IP address is what devices use to talk to each other inside your home network. Changing one does not change the other, and they solve different problems.
Key Takeaways
- Restarting your modem usually changes your public IP address within minutes, and this is the fastest way to get a new one.
- Your private IP addresses (the ones your devices use at home) are assigned by your router and can be changed in the router settings without restarting anything.
- Changing your IP address does not hide your activity from your internet service provider or encrypt your traffic — it only changes how you appear to outside websites.
- Some services block or throttle traffic from certain IP ranges, and changing your IP can restore access if you have been caught in one of those blocks.
Changing your public IP by restarting your modem
Your internet service provider assigns your public IP address through your modem. The fastest way to get a new one is to power-cycle the modem — turn it off, wait, and turn it back on. Unplug the modem from power for 30 seconds, then plug it back in. Wait three to five minutes for it to fully restart and reconnect to your ISP. Your public IP address will usually change during this process.
This works because your ISP does not permanently lock you to one address. When the modem disconnects and reconnects, the ISP's system assigns it a new address from the available pool. The new address is usually different, though occasionally you may get the same one back — this is random and depends on how many addresses the ISP has available and how many customers are online.
If you have a combined modem-router unit (sometimes called a gateway), restarting it will restart both devices at once. Separate modems and routers restart independently, so you only need to restart the modem to change your public IP.
Changing private IP addresses on your devices
The IP addresses your devices use inside your home network are assigned by your router. These are usually in the range 192.168.1.x or 10.0.0.x, and they let your phone, laptop, and smart TV talk to each other and the router. You can change these without restarting anything, and you have two options: let the router assign a new one automatically, or set a static IP manually.
To get a new private IP automatically, go to your device's network settings, forget the Wi-Fi network, and reconnect. Your router will assign a new private IP from its available pool. This takes less than a minute. On Windows, you can also open Command Prompt and type ipconfig /release followed by ipconfig /renew to force a new private IP without disconnecting.
If you want to set a static private IP instead, you log into your router's settings (usually at 192.168.1.1 or 192.168.0.1 in your browser), find the device in the connected devices list, and assign it a fixed address. This is useful if you want a device to always have the same private IP — for example, if you are setting up a home server or need consistent access to a printer. The exact steps vary by router brand, so check your router's manual or support page for the specific path.
When changing your IP actually solves a problem
Changing your public IP helps when a website or service has blocked your current address. This happens most often with streaming services, online games, or data centers that flag IP ranges as suspicious or from a different region than expected. If you suddenly cannot access a service you normally use, a new public IP may restore access.
Changing your private IP rarely solves a problem for most people, but it can help if a device is having trouble connecting to your network or if you are troubleshooting a conflict where two devices ended up with the same private address (which should not happen, but occasionally does with older or misconfigured devices).
Changing your IP does not solve privacy or security problems on its own. Your internet service provider still sees all your traffic regardless of your IP address. Websites can still track you through cookies, login accounts, and browser fingerprinting. If you are concerned about privacy, you need encryption (like HTTPS, which most sites use) and possibly a VPN — not just a new IP address.
Why your ISP might not let you change it easily
Some internet service providers assign you a static public IP address that does not change when you restart the modem. This is common for business accounts or premium home plans. If restarting your modem does not change your IP after several tries, your ISP may have locked you to one address.
You can check your current public IP by visiting a site like whatismyipaddress.com or ipinfo.io. Write down the address, restart your modem, wait five minutes, and check again. If the address is the same after multiple restarts, contact your ISP to ask whether your account has a static IP. If it does and you want a dynamic one, they can usually change this in your account settings, though some providers charge extra for the flexibility.
What happens to your devices when the IP changes
When your public IP changes, any active connections to the internet may drop briefly and reconnect. Downloads in progress may pause or restart. Online games may kick you out and require you to log back in. This is why you should not restart your modem in the middle of something important.
When a private IP changes, only that specific device is affected. Other devices on your network keep working normally. If you change a device's private IP while it is connected, it will disconnect and reconnect with the new address — usually within a few seconds.
Frequently Asked Questions
Will changing my IP hide me from my internet service provider?
No. Your ISP sees all traffic from your modem regardless of what IP address you have. Changing your IP address does not hide anything from your ISP — it only changes how you appear to websites and services on the internet. If privacy from your ISP is your concern, you need a VPN, not a new IP.
How often does my public IP change on its own?
This depends on your ISP's settings. Most home internet accounts have dynamic IPs that change every few days to a few weeks, usually when the modem restarts or when your ISP's lease on that address expires. Business accounts and some premium plans use static IPs that do not change unless you request it.
Can I pick what my new IP address will be?
No. Your ISP assigns your public IP from a pool of available addresses — you cannot choose which one. For private IPs on your home network, you can set a static address manually in your router settings, but you are still limited to addresses in the range your router supports (usually 192.168.1.1 through 192.168.1.254).
Does changing my IP address make my home network more find?
Not significantly. Changing your IP does not stop attackers who already know your address, and it does not protect against most common attacks. Real security comes from strong passwords, keeping devices updated, using a firewall (which your router has), and not opening ports unnecessarily. A new IP is a minor obstacle, not a defense.
What if my device keeps getting the same private IP after I change it?
Your router may have assigned that address as a static reservation for that device, or the device may be requesting the same address it had before. Check your router settings to see if the device is listed as having a reserved IP, and remove the reservation if you want it to get a different address each time.