What Is a Dynamic IP Address?
A dynamic IP address is one that your ISP assigns temporarily and can change over time. Most home internet connections use dynamic IPs because ISPs have a limited pool of addresses and need to share them across customers. Your IP might change when you restart your router, after a power outage, or when your ISP's DHCP lease expires (typically every 24-72 hours).
What Is a Static IP Address?
A static IP address is permanently assigned to your connection and never changes. These are typically used by businesses that run servers, host websites, or need consistent remote access. Most ISPs charge extra for static IPs — usually $5-15/month for residential customers.
Comparison
| Dynamic IP | Static IP | |
|---|---|---|
| Changes over time | Yes | No |
| Cost | Included in plan | Usually extra |
| Setup | Automatic | Requires ISP setup |
| Best for | Home browsing | Servers, remote access |
| Security | Slightly harder to target | Consistent target |
| Most people have | ✓ Yes | No |
Do I Have a Dynamic or Static IP?
If you have a standard home internet plan and haven't specifically requested a static IP, you almost certainly have a dynamic IP. You can check by visiting our IP lookup tool today and again in a week — if the number changed, it's dynamic.
When Would I Need a Static IP?
Most people never need one. You might need a static IP if you're hosting a website or game server from home, setting up persistent remote desktop access, running security cameras that need to be accessed from outside your network, or using certain business VPN configurations.
Can I Change My Dynamic IP?
Yes — our guide on changing your IP covers several methods including restarting your router, using a VPN, and contacting your ISP.