How Long Do You Need to Disconnect from the Internet to Get a New IP Address?

If you've ever wondered whether pulling your router's plug for a few seconds will land you a fresh IP address, the answer is: it depends — and the variables matter more than most guides let on.

What's Actually Happening When Your IP Address Changes

Your IP address (Internet Protocol address) is assigned to your router by your ISP (Internet Service Provider) using a system called DHCP — Dynamic Host Configuration Protocol. Think of DHCP as a temporary lease agreement. Your ISP loans you an IP address for a set period called a lease duration, and when that lease expires, you may get a different one.

The key phrase is may get. There's no guarantee the new lease brings a new address. ISPs often re-assign the same IP to the same customer, especially if you reconnect quickly or if the address pool in your area is small.

This is why disconnection time isn't a simple formula — it's one variable inside a larger system your ISP controls.

The Role of DHCP Lease Time ⏱️

Every ISP sets its own DHCP lease durations. Common lease times range from a few hours to several days. Some ISPs run shorter leases (4–8 hours); others set them as long as 7 days.

When you disconnect:

• If your lease hasn't expired, reconnecting will almost always return the same IP address — your ISP's server remembers the lease is still active.
• If your lease has expired, your router requests a new one, and there's a reasonable chance the IP changes — though it's still not guaranteed.

So the minimum effective disconnection time is roughly equal to your remaining lease duration — which you typically can't check without calling your ISP or digging into router logs.

Why "Just Unplug for a Few Minutes" Often Doesn't Work

This is the most common misconception. Unplugging your router for 5 or 10 minutes almost never triggers an IP change unless your lease happened to expire during that exact window — which is essentially luck.

The reason: your ISP's DHCP server holds your lease record independently of whether your router is online. Going offline doesn't erase that record. The lease clock keeps ticking on the ISP's server, not your hardware.

Factors That Determine Whether Disconnection Changes Your IP

Static IP addresses — often associated with business plans — will not change under any disconnection method. They're fixed by agreement with the ISP.

Dynamic IP addresses — standard for most home connections — are the ones DHCP governs, and these are what this whole process applies to.

Common Approaches and What Actually Works

Leaving the router unplugged overnight (8+ hours) is the approach most likely to work for average home connections, since it increases the odds your lease expires during the downtime. This isn't reliable, but it's the most practical offline method.

Releasing your IP before disconnecting can help on some setups. On many routers, the admin panel (typically accessed at 192.168.1.1 or 192.168.0.1) includes an option to release the current DHCP lease before you power down. This actively tells the ISP's server you're surrendering the address — which improves the odds you'll receive a different one on reconnect.

Contacting your ISP directly is the only method with a reliable outcome. Most ISPs can release and reassign your IP on request, though policies vary.

What Doesn't Change Your IP Address 🔌

• Restarting your devices (phone, laptop, desktop) — these get their IP from your router, not the ISP
• Switching between Wi-Fi and mobile data changes your IP, but only because you're now on a different network
• Using browser privacy modes or clearing cookies — these have no effect on your network-level IP

The Spectrum of Outcomes

Someone on a residential cable plan with a 4-hour lease who releases their IP and stays offline overnight has a reasonable chance of getting a new address.

Someone on a fiber plan with a 7-day lease who unplugs for 30 minutes is almost certainly coming back with the same IP.

Someone on a business plan with a static IP won't change their address regardless of what they do with the router.

And someone using a VPN or proxy sidesteps this entire process — because those tools mask your real IP with a different one at the network layer, without requiring any changes to your actual ISP-assigned address.

The Missing Piece Is Your Specific Setup

How long you need to disconnect — and whether disconnection will even work — depends on your ISP's lease duration, your account type, and their re-assignment behavior. These details vary significantly between providers, regions, and even plan tiers. Without knowing those specifics, there's no single answer that applies universally to every router sitting in every home.