Ask your ISP whether your home connection has a static or dynamic IP address, and the answer explains a lot about how your connection behaves — from whether you can reliably self-host something to how consistently privacy and reputation tools see you.
The core difference
A dynamic IP is assigned by your ISP from a shared pool and can change — after a router restart, a lease renewal, or on the ISP's own schedule. A static IP is assigned to your connection specifically and stays the same indefinitely, typically as a paid add-on from business or premium residential plans.
What each is actually good for
- Dynamic IP — the default for most home internet, cheaper to provision at scale for the ISP, and for typical browsing the change is invisible to the user.
- Static IP — useful for self-hosting a server, running remote-access software that needs a stable address, or any setup where something outside your network needs to reliably find you at the same address every time.
How to tell which you have
The most reliable way is to check your public IP now, restart your router, and check again after it reconnects. If the address changes, you have a dynamic IP (even if it doesn't change often — some ISPs assign long leases that only rotate infrequently). If it stays exactly the same, you likely have a static IP, though the only fully certain way to know is checking directly with your ISP.
The reputation angle
Because dynamic IPs get reassigned between customers over time, an address's reputation history can reflect a previous occupant's behavior rather than yours — see What Is IP Reputation? for why that matters when interpreting a risk or reputation result.
FAQ
Is a static IP more secure?
Not inherently — a stable, known address is actually easier for something to be aimed at repeatedly if left unprotected. Security depends on what's actually running and exposed on the connection, not on whether the address itself changes.
Can I request a static IP from my home ISP?
Often yes, usually as a paid add-on or a business-tier plan — check directly with your provider, since availability and pricing vary widely.