Your internet drops, you restart the router, and then wonder: does restarting router change IP? Sometimes it does. Often it does not. The answer depends on the type of IP address you mean, how your internet service provider assigns addresses, and whether your connection uses IPv4, IPv6, or carrier-grade NAT.
For most home users, a restart is worth trying when a connection is acting up. But it is not a dependable method for getting a new public IP address, bypassing an IP-based restriction, or fixing an issue caused by your ISP.
Does Restarting a Router Change Your IP Address?
Restarting a router can change your public IP address, but only if your ISP gives you a new address when the router reconnects. Many residential internet plans use dynamic IP addressing, which means the ISP can assign a different public IPv4 address over time. That does not mean every reboot produces a new one.
Your ISP commonly assigns the address through DHCP, short for Dynamic Host Configuration Protocol. The ISP may retain your current address for a lease period, such as several hours or days. If your router reconnects before that lease expires, the ISP may simply give it the same address again.
Some providers also associate an address with the modem, router, gateway, or the device identifier used on the connection. In those cases, turning the router off for 30 seconds and turning it back on may have no effect at all. A longer outage can sometimes change the result, but there is no universal timeframe and no guarantee.
A static public IP is different. If you pay your ISP for a static IP address, it is intended to remain the same. Restarting the router will not normally change it. That consistency is useful for businesses, servers, remote-access systems, security allowlists, and any setup where other people or services need to find your network at a known address.
Public IP vs. Private IP: The Difference That Matters
A router handles more than one kind of address, which is why this question can be confusing.
Your public IP address is the address visible to the internet. Your ISP assigns it to the internet-facing side of your network. Websites, game servers, VPN endpoints, and remote services generally see this address when you connect.
Your private IP address belongs to a device inside your home or office network. Common private IPv4 ranges include 192.168.x.x, 10.x.x.x, and 172.16.x.x through 172.31.x.x. Your router assigns these local addresses to laptops, phones, consoles, printers, and smart devices.
Think of the public IP as the street address of an apartment building. Private IP addresses are apartment numbers inside that building. A package coming from outside needs the street address first. The router then uses network address translation, or NAT, to direct traffic to the appropriate device inside.
Restarting a router may also change private addresses because the router’s local DHCP service renews device leases. However, many routers try to give each device the same private address it had before. If you need a device to keep a specific local address for port forwarding, a network printer, or a media server, create a DHCP reservation in the router settings rather than relying on a restart.
Why Your Public IP May Stay the Same After a Restart
A router restart is a brief interruption, not a request for a new IP. Your ISP decides whether the address changes. Several factors can keep the same address assigned to you.
First, the DHCP lease may still be active. Second, the ISP may have available capacity but no reason to move your connection to another address. Third, your modem or gateway may remain registered with the provider even while the separate Wi-Fi router restarts. If the modem never loses its WAN connection, the public IP may not change.
The type of service also matters. Cable, fiber, fixed wireless, DSL, and cellular providers use different provisioning systems. Cellular and fixed-wireless connections frequently use carrier-grade NAT, also called CGNAT. Under CGNAT, multiple customers can share one public IPv4 address. Your router may receive a non-public WAN address, while the public address websites see is managed farther upstream by the carrier.
CGNAT conserves scarce IPv4 addresses, but it can complicate inbound connections. If you are trying to host a game server, use remote desktop, operate a security camera system, or configure port forwarding, restarting the router will not remove CGNAT. You may need a public IP option from your ISP, a static IP service, IPv6 connectivity, or a remote-access solution designed to work without inbound port forwarding.
How to Check Whether Your IP Actually Changed
Do not rely only on the IP shown in your router’s administration page. That page may display a private WAN address, especially when CGNAT is involved. Instead, check the public IP that websites can see.
Before restarting, record your current public IPv4 address. You can use WhatIsMyPublicIP.com to view it immediately, along with location data and related diagnostic tools. Then restart the router, wait for the internet connection to fully return, and check again from the same network.
If the number is different, your public IPv4 address changed. If it is identical, the ISP kept or reassigned the same address. Repeat checks over a longer period only if you have a legitimate troubleshooting reason. A change in the city or map location associated with the address does not necessarily mean your physical location changed. IP geolocation is an estimate based on provider and routing data, not GPS.
If you use a VPN, proxy, privacy relay, or corporate network, disable it before testing if your goal is to identify your home connection’s public address. Otherwise, the displayed IP may belong to the VPN provider or your employer’s network instead of your ISP.
Check the WAN Address Too
For a deeper diagnosis, compare the public IP shown by an external IP checker with the WAN or Internet IP listed in your router or gateway.
If both addresses match, your router likely holds the public IPv4 address directly. If they do not match and the router shows an address such as 10.x.x.x, 100.64.x.x through 100.127.x.x, 192.168.x.x, or 172.16.x.x through 172.31.x.x, there is another NAT layer between your router and the public internet. CGNAT is a common reason.
This comparison is especially useful when port forwarding appears correctly configured but outside connections still fail. The router may be doing its job locally while the ISP’s NAT layer prevents unsolicited inbound traffic.
Restarting the Router vs. Restarting the Modem
Many households use a single gateway device supplied by the ISP. It combines a modem, router, Wi-Fi access point, and sometimes voice service. Restarting that device briefly disconnects both the local network and the ISP connection, so it has the best chance of triggering a new DHCP request.
In a two-device setup, the modem connects to the ISP and the router connects to the modem. Restarting only the router usually refreshes your local network. The modem may keep the same public connection and IP address. To fully reconnect the WAN side, restart the modem as well, then wait until it is online before powering on the router.
This sequence can resolve temporary connection problems, stale routing sessions, or a router that has stopped issuing local addresses correctly. It is not a cure for low ISP bandwidth, neighborhood outages, damaged cabling, account provisioning problems, or DNS failures. For those issues, an internet speed test, ping test, traceroute, and a check of the ISP’s service status provide more useful evidence.
IPv6 Changes the Question
IPv6 addresses work differently from traditional IPv4 addresses. Your ISP may assign an IPv6 prefix to your router, and the router can then assign IPv6 addresses to devices on your network. That prefix may remain stable for a while or change when the connection renews, depending on your provider.
A device can also use temporary IPv6 privacy addresses that rotate automatically. As a result, you may see an IPv6 address change even when your public IPv4 address remains the same. If you are diagnosing a firewall rule, remote service, or access log, confirm whether the traffic uses IPv4 or IPv6 before drawing conclusions.
When You Actually Need a Different IP
A new IP can be useful after an accidental IP-based block, when testing a service from a different network identity, or when investigating a suspected address reputation problem. But rebooting is usually the least reliable option.
For legitimate operational needs, contact the ISP to ask whether your plan uses dynamic, static, or CGNAT addressing. A business-grade service or static public IP may be the better choice for server hosting and dependable remote access. If an online service has blocked your address, contact that service rather than repeatedly restarting equipment to force an address change.
A router reboot is still one of the first practical troubleshooting steps. Just treat it as a way to refresh the connection, not as a guaranteed public-IP reset. Check the externally visible address before and after, then use what you find to decide whether the issue is inside your network, at the ISP, or farther along the route.
