What Is a Static IP Address (vs Dynamic)?
A static IP address is a fixed address that stays the same every time a device connects, unlike a dynamic IP that's reassigned by DHCP. Static IPs are used for servers, remote access, and hosting because they're reliably reachable at the same address — but they cost more and require manual management.
Should you use a static IP? Here's the full picture.
Static vs Dynamic (DHCP)
Most devices get a dynamic IP from a DHCP server (your router or ISP), which leases addresses from a pool and can change them over time. A static IP is set manually and never changes on its own.
| Static IP | Dynamic IP | |
|---|---|---|
| Changes? | Never (manually fixed) | Can change on lease renewal |
| Assigned by | You / admin | DHCP automatically |
| Setup effort | Manual configuration | Automatic |
| Cost | Often a paid add-on | Usually free/default |
| Best for | Servers, remote access | Laptops, phones, general use |
Why Use a Static IP?
A static IP shines when something must always be found at the same address:
- Hosting servers — web, mail, game, or file servers clients connect to.
- Remote access — SSH, RDP, or VPN into a machine from elsewhere.
- Port forwarding — router rules that point to a fixed internal IP.
- DNS records — an
Arecord points a domain at a fixed IP (see DNS Record Types Explained). - Whitelisting — services that allow access only from a known IP.
For internal devices, many people use a DHCP reservation instead — the router always hands the same IP to a given MAC address, giving you static behavior without manual config on the device.
Downsides of a Static IP
- More management — you must track addresses and avoid conflicts.
- Cost — ISPs often charge for a static public IP.
- Security exposure — a fixed, predictable address is a steadier target for scans and attacks (mitigate with firewalls and good hygiene).
- No automatic failover — if you misconfigure it, the device won't fall back gracefully.
How to Get a Static IP
- Private static IP (LAN): set it manually on the device, or — better — create a DHCP reservation on your router keyed to the device's MAC address.
- Public static IP (internet): request one from your ISP (usually a paid option), or use a cloud provider that assigns a static/elastic IP to your server.
When planning addresses, make sure your static IPs sit outside the DHCP pool to avoid conflicts. Our Subnet Calculator and CIDR Calculator help you map the ranges, and IP to Binary is handy for understanding the addressing. For more fundamentals, see What Is an IP Address?.
Frequently Asked Questions
What is a static IP address? A fixed IP that doesn't change between connections, manually assigned rather than handed out dynamically by DHCP.
What's the difference between static and dynamic IP? A static IP stays the same; a dynamic IP is assigned automatically by DHCP and can change over time.
Do I need a static IP? You need one (or a DHCP reservation) if a device must be reliably reachable at the same address — servers, remote access, port forwarding, or DNS records.
What are the downsides of a static IP? More manual management, potential extra cost from your ISP, and a more predictable target for attackers.
How do I get a static IP? Set it manually or use a DHCP reservation on your router for a local IP; request one from your ISP or cloud provider for a public IP.
Related Reading
Use dynamic IPs for everyday devices and static IPs (or DHCP reservations) for anything that must be found at the same address every time — servers, remote access, and forwarding rules.