Your IP address changes when your internet provider assigns you a new one, which happens unpredictably unless you pay for a static IP

Most home internet users have a dynamic IP address, meaning your provider can reassign it whenever they want. In practice, this usually happens when you restart your modem, when your provider performs maintenance, or straightforward after a set period of time — often 30 to 90 days. You will not receive a warning, and you will not choose when it happens. If you need the same IP address to stay constant, you must request a static IP from your provider, which typically costs extra per month.

The reason this matters is that some devices and services rely on knowing your IP address ahead of time. If you run a home server, host a website from your house, or need to access your home network from outside your home, a changing IP address breaks those connections. For most people — those who straightforward browse the web and check email — IP changes are invisible and irrelevant.

Key Takeaways

  • Dynamic IP addresses, which most home internet users have, change without warning when your modem restarts, during provider maintenance, or after 30 to 90 days of use.
  • You can request a static IP address from your internet provider, but this usually costs between $5 and $15 per month depending on your provider.
  • A changing IP address only affects you if you run services from home, host content, or need to access your home network remotely using the IP address directly.
  • You can check your current IP address by searching "what is my IP" in any web browser, and you can see your local network IP in your router settings.

What triggers an IP address change

The most common trigger is restarting your modem. When you unplug it, wait a few seconds, and plug it back in, your provider's system assigns you a fresh IP address from their available pool. This happens because your modem has to re-authenticate with the provider's network, and the provider treats it as a new connection.

Provider maintenance also forces reassignment. Internet companies periodically update their infrastructure, and when they do, they shuffle IP addresses across their customer base. You will not see an announcement for this — it straightforward happens overnight or during scheduled maintenance windows.

Time-based expiration is the third reason. Your provider assigns your IP address a lease period, usually 30 to 90 days. When that lease expires, the provider reclaims the address and gives you a different one. Some providers renew your existing address automatically if it is available, but others assign you a new one. There is no way to predict which will happen.

The difference between your public IP and your local IP

Your public IP address is what the internet sees — it is assigned by your internet provider and is the address that changes. Your local IP address is what your devices use inside your home network, assigned by your router, and it almost never changes unless you manually alter it or reset your router to factory settings.

This distinction matters because they serve different purposes. Your public IP is what websites see when you visit them. Your local IP is what lets your phone talk to your printer or your computer talk to your smart TV. When people ask "will my IP address change," they usually mean the public one, because that is the one your provider controls.

You can find your public IP by opening any web browser and searching for "what is my IP." You will see a number like 203.45.67.89. Your local IP is usually something like 192.168.1.5 or 10.0.0.3, and you can find it by logging into your router's settings page or checking your device's network settings.

When a changing IP address actually matters

If you run a home server — a computer that hosts files, websites, or services for people to access from outside your home — a changing IP address breaks those connections. Anyone trying to reach your server using your IP address will lose access when it changes. This is why people who run servers pay for static IPs.

Remote access tools like TeamViewer or AnyDesk work around this problem by using a service account instead of your IP address, so they continue working even if your IP changes. But if you have set up port forwarding on your router to reach a specific device at home, that setup depends on your public IP staying the same.

For everyday internet use — browsing, email, video calls, social media — IP changes are completely invisible. Websites do not care what your IP is beyond the moment you visit them. Your email works the same way. Streaming services do not track your IP. A changing address causes no disruption to normal internet activity.

How to request a static IP address

Contact your internet provider's customer service and ask whether they offer static IP addresses and what the monthly cost is. Most major providers offer this service, though the price and process vary. Some providers charge $5 to $10 per month; others charge $15 or more. A few providers include static IPs at no extra cost for certain account types, so it is worth asking.

When you request a static IP, the provider assigns you a permanent address that will not change unless you request it. The provider will give you that address, and you configure it in your modem or router settings. The process usually takes one business day, and the provider may need to send a technician or walk you through the configuration over the phone.

Keep in mind that a static IP is a service you are paying for, and if you cancel it, your address will revert to dynamic. Some providers also require a static IP for business-class internet plans, which cost more than residential plans but include other features like higher upload speeds and may provide uptime.

Checking whether your IP has changed

The simplest way to check your current public IP is to open a web browser and search for "what is my IP." Several free websites will display it when ready. Write down or screenshot your IP address, then check again after restarting your modem or waiting a few days. If the number is different, your IP has changed.

If you need to track your IP address over time — for example, to confirm whether it is stable or changing frequently — you can use a service like WhatIsMyIPAddress.com or similar sites that let you check your history. Some routers also display your public IP in their settings page, usually under a section called "Internet" or "WAN Status."

If you have a static IP and you notice it has changed, contact your provider when ready. A change to a static address usually means there is a configuration problem or a billing issue, and the provider can restore it.

Frequently Asked Questions

Does restarting my modem always change my IP address?

Usually, but not always. Most of the time, restarting your modem triggers a new IP assignment. Occasionally your provider reassigns you the same address you had before, especially if you restart within a short time. The safest assumption is that restarting will change it, so avoid restarting unless you need to troubleshoot a connection problem.

Can I keep my IP address from changing?

Yes, by requesting a static IP from your provider. This costs extra per month but guarantees your address stays the same. If you do not need a static IP, the only way to minimize changes is to avoid restarting your modem and hope your provider does not reassign you during maintenance.

Will my IP address change if I move to a different house?

Yes, almost certainly. Your IP address is tied to your location and your provider's service area. When you move, you will get a new provider or a new account with the same provider, and you will receive a new IP address. Even if you keep the same provider, they assign addresses based on your physical location.

Does my IP address change when I use a VPN?

No, your actual IP address does not change. A VPN masks your IP address and shows websites a different one instead, but your real address stays the same. When you disconnect from the VPN, websites see your actual IP again. Using a VPN does not affect whether your provider reassigns your address.

What should I do if I need a static IP but cannot afford it?

Consider using a dynamic DNS service, which automatically updates a domain name to point to your current IP address whenever it changes. This costs less than a static IP and works well if you need to access your home network remotely. Services like No-IP or DynDNS offer free or low-cost options.