What changing your IP address on one device actually does

Changing your IP address on one device gives that device a different identity on your network or the internet. Your IP address is how other computers find and talk to yours — it's like a mailing address for data. When you change it, you're telling your device to use a different address instead of the one it was assigned.

The method depends on whether you want a new address from your internet provider (which requires going through your modem), a different address on your home network only, or a temporary address through a VPN service. Most people fall into one of these three categories, and each one works differently.

Key Takeaways

  • Your device gets an IP address automatically from your router or modem, and you can force it to request a new one by renewing your DHCP lease.
  • Changing your IP address on your home network only takes a few minutes through your device's network settings and does not affect other devices.
  • A VPN service masks your real IP address and gives you a temporary one, but it slows your connection slightly and works only while the VPN is running.
  • Restarting your modem can force your internet provider to assign your device a completely new public IP address, though this may take 10 to 30 minutes.
  • The method you choose depends on whether you need a new address from your provider, just on your local network, or for privacy reasons.

Renewing your DHCP lease to get a new address from your router

The fastest way to get a new IP address on your device is to renew your DHCP lease. DHCP is the system your router uses to hand out addresses automatically. When you renew the lease, your device asks the router for a fresh address — and often gets a different one.

On Windows: Open Command Prompt (search for "cmd" in the Start menu), right-click it, and select "Run as administrator". Type ipconfig /release and press Enter. Wait a few seconds, then type ipconfig /renew and press Enter. Your device will request a new address from your router.

On Mac: Open System Preferences, go to Network, select your connection (Wi-Fi or Ethernet), click Advanced, then the TCP/IP tab. Click "Renew DHCP Lease" and confirm. Your Mac will request a new address when ready.

On iPhone or iPad: Go to Settings, tap Wi-Fi, find your network, tap the info icon next to it, and toggle "Renew Lease" on. The device will request a new address the next time it connects.

On Android: Go to Settings, tap Network & Internet, select your Wi-Fi network, tap the gear icon, scroll down to IP settings, and change it from "DHCP" to "Static" and back to "DHCP". This forces a renewal.

This method usually works, but your router might assign you the same address again — especially if you renew when ready. If you get the same address, wait a few hours and try again, or move to the next method.

Assigning a static IP address on your local network

If you want to set a specific IP address that stays the same, you can assign a static address directly on your device. This is useful if you need a device to always be at the same address on your home network, but it does not change your public IP address (the one the internet sees).

On Windows: Open Settings, go to Network & Internet, select your connection, scroll down and click "Edit" next to IP assignment. Change the setting from Automatic to Manual, toggle IPv4 on, and enter your new address (usually something like 192.168.1.100, depending on your router). Enter your router's address as the gateway (usually 192.168.1.1) and a DNS server (8.8.8.8 works). Click Save.

On Mac: Open System Preferences, go to Network, select your connection, click Advanced, then the TCP/IP tab. Change "Configure IPv4" from Automatic to Manual. Enter your desired address in the IPv4 Address field, your router's address in the Router field, and a DNS server address. Click OK and explore.

On iPhone or iPad: Go to Settings, tap Wi-Fi, find your network, tap the info icon, scroll to IPv4 Address, and tap Configure IP. Select Manual and enter your desired address, subnet mask (usually 255.255.255.0), and router address. Tap Save.

On Android: Go to Settings, tap Network & Internet, select your Wi-Fi network, tap the gear icon, scroll to IP settings, and change from DHCP to Static. Enter your desired address, gateway, and DNS server. Tap Save.

Choose an address in the range your router uses but outside the DHCP pool — ask your router's manual or check its admin page to see which addresses it reserves for automatic assignment. This prevents conflicts with other devices.

Restarting your modem to get a new public IP address

If you want a completely new IP address from your internet provider (your public IP, the one websites see), restart your modem. This forces your provider to assign your device a fresh address, though the process takes time.

Unplug your modem's power cable, wait 30 seconds, and plug it back in. The modem will take 2 to 5 minutes to restart and reconnect to your provider. Once the lights stabilize, your device should have a new public IP address. You can check your public IP by visiting a site like whatismyipaddress.com.

This method works reliably, but your provider might assign you the same address again if you wait only a few minutes. If you need a different address, wait at least an hour before restarting again. Some providers cycle addresses slowly, so you may need to restart multiple times over several hours to get a truly different one.

Do not unplug your modem while it is actively transferring data — wait until you are not using the internet. If you have a separate router, unplug the modem only, not the router.

Using a VPN to mask your IP address temporarily

A VPN (Virtual Private Network) does not change your real IP address, but it hides it from websites and makes it look like you are in a different location. Your traffic goes through the VPN's servers, so websites see the VPN's IP instead of yours.

read a VPN app (common options include ExpressVPN, NordVPN, Surfshark, and ProtonVPN — all charge a monthly fee). Install it, open it, and select a server location. Once connected, your device will appear to have the VPN's IP address. Disconnect the VPN and your real address is visible again.

VPNs are useful for privacy and accessing content from different regions, but they slow your connection slightly and only work while the app is running. They also do not change your address on your home network — other devices on your Wi-Fi will still see your real local IP.

Be aware that free VPN services often sell your data or inject ads. Paid services are more reliable, but you should read reviews before choosing one.

When to call a professional or contact your provider

If you have tried renewing your DHCP lease and restarting your modem but your device still cannot connect to the network, or if you need a static IP address but do not understand the gateway and DNS settings, contact your internet provider's support line. They can walk you through the process for your specific modem and router.

If you are trying to change your IP address because you are locked out of a service or account, contact that service's support team instead — they can help you regain access without needing to change your address.

If you are setting up a device for a specific purpose (like hosting a server or running security software that needs a fixed address), a professional IT technician can help you choose the right method and avoid conflicts with other devices on your network.

Frequently Asked Questions

Will changing my IP address on one device affect other devices on my network?

No. Renewing your DHCP lease, assigning a static address, or using a VPN only changes that one device's address. Other devices keep their own addresses and are not affected. If you restart your modem, all devices on your network will get new addresses from your provider, but each one will still have its own.

How do I know if my IP address actually changed?

For your local network address, open Command Prompt (Windows) or Terminal (Mac) and type ipconfig (Windows) or ifconfig (Mac). Look for the "IPv4 Address" line. For your public IP address, visit whatismyipaddress.com in your browser before and after making the change. Write down the address before you start so you can compare.

Can I change my IP address to any number I want?

On your home network, yes — you can assign any address in your router's range (usually 192.168.1.0 to 192.168.1.255). Your internet provider assigns your public IP, so you cannot choose that number directly, but restarting your modem will get you a different one from their pool. A VPN lets you choose from their available server locations.

Why does my device get the same IP address after I renew the lease?

Your router remembers which address it gave your device and often assigns the same one again when you renew. If this happens, wait a few hours before renewing again, or assign a static address instead. Restarting your modem is more likely to give you a truly different address.

Is it safe to change my IP address?

Yes. Renewing your DHCP lease, assigning a static address, or using a VPN are all safe operations. Restarting your modem is also safe — it is the same as unplugging and replugging any other device. The only risk is briefly losing internet access while the modem restarts, so do not do it while you are in the middle of important work.