Static vs dynamic IP addresses
A static IP address stays the same until you or your provider change it. A dynamic IP address is lent to you and can change, for example when your router restarts. Most home connections are dynamic.
Dynamic addresses
Your provider gives your router an address from a pool, using a lease. When the lease ends or the connection drops and reconnects, you may get a different address. Many providers keep the same address for months in practice, but they do not promise it.
Static addresses
A static address is assigned to you and does not change. Providers often charge extra for it, and business packages usually include one. Inside your home, a device can also be given a fixed private address by your router, which is called a reservation.
When a static address helps
A fixed address is useful when something needs to find you reliably:
- Hosting a website, game server or camera that people reach from outside.
- Remote access to your home or office network.
- Services that only allow connections from an approved address.
Alternatives to paying for one
A dynamic DNS service links a fixed name to your changing address and updates it automatically. Some tunnel services let you reach a device without opening your network at all.
How to tell which you have
Check your address on the My IP page, restart your router, wait a few minutes and check again. If the address has changed, it is dynamic. If it never does, it may be static or just stable.
Common questions
Is my home IP address static or dynamic?
Almost certainly dynamic unless you pay for a static address. Your provider can confirm.
Does a dynamic address change often?
It depends on the provider. Some change daily and many stay the same for months.
Is a static IP address less secure?
It is not less secure on its own, but a fixed, known address makes it easier for others to target, so keep services you expose up to date.