Your internet stops working because something broke the path between your home and the internet backbone

When your internet is down, one of four things has failed: your modem, your router, the line coming into your house, or the internet service provider's equipment or network. The path from your device to the wider internet has a break in it somewhere. Your device still works. The internet still exists. But the connection between them is severed.

Most of the time, the break is temporary and fixes itself. A modem overheats and reboots. A router loses power for a second. A line gets wet. The provider's equipment hiccups. These things happen dozens of times a day across millions of homes, and you never notice because the connection comes back in seconds or minutes. When you do notice, something took longer to recover than usual, or didn't recover on its own at all.

Understanding where the break likely is helps you know whether to restart something, call your provider, or just wait. The break is almost never your fault, and it is almost never something you can fix yourself — but knowing which part failed tells you what to do next.

Key Takeaways

  • Your modem connects the physical line entering your house to your router; your router broadcasts the wireless signal to your devices — they are two separate pieces of equipment with two separate jobs.
  • If your modem has no lights on or shows a red light, the problem is between your house and your provider's network, and restarting the modem is the first step.
  • If your modem lights are normal but your router is dark or not broadcasting, restart the router — this fixes most home network outages.
  • If both modem and router look normal but you still have no internet, the break is at your provider's equipment or network, and you need to contact them.
  • Outages that affect your whole neighborhood show up on your provider's website or in their app, and they will tell you when service is expected to return.

The difference between your modem and your router

These are two different devices doing two different jobs, and most people confuse them. Your modem is the box that connects to the physical line coming into your house — the cable, fiber, or phone line that your provider owns. The modem's job is to translate the signal on that line into data your devices can use. It sits between the outside world and your home network.

Your router is the box that takes the data from the modem and broadcasts it wirelessly to your phone, laptop, and other devices. It creates the network you see when you look for WiFi. The router does not talk to your provider — it only talks to the modem and to your devices.

When your internet is down, the break is usually in one of these two devices, or in the line between them. If the modem is dead, nothing works. If the router is dead, your devices cannot see the network, but the modem is still receiving signal from your provider. If the line between them is loose or damaged, the modem and router cannot talk to each other. Knowing which one is the problem tells you what to do.

How to tell which part has failed

Look at the lights on your modem first. Most modems have a power light, an internet light, and lights for each connected device. The power light should be solid. The internet light should be solid green or blue — not red, not orange, not off. If the power light is off, the modem has no electricity. If the internet light is red or off, the modem is not receiving signal from your provider's network.

Now look at your router. It should have a power light and a WiFi light. The power light should be solid. The WiFi light should be on and steady, not blinking constantly. If the router is completely dark, it has no power. If the power light is on but the WiFi light is off, the router is not broadcasting — it may have lost connection to the modem, or it may have crashed.

If both devices look normal — all lights are on and steady — then the problem is not in your home. The break is at your provider's equipment or somewhere in their network between your house and the internet backbone. This is the one situation where restarting your equipment will not help.

Restarting your modem and router

Restarting fixes most outages because it clears errors that have built up in the device's memory and forces it to reconnect from scratch. Unplug the modem from power. Wait 30 seconds — this is not arbitrary, it takes about that long for the device to fully discharge. Plug it back in. The lights will go dark, then come back on one by one. Wait two to three minutes for the internet light to turn solid green or blue. Do not do anything else during this time.

If the modem's internet light does not turn solid after three minutes, the problem is not your modem — it is the line or your provider's network. Leave the modem plugged in and move to the next step.

Now restart the router the same way: unplug it, wait 30 seconds, plug it back in. Wait two to three minutes for the WiFi light to turn solid. If your devices can now see the WiFi network and connect to the internet, the problem was the router. If the WiFi light is still off or blinking, or if your devices connect but have no internet, the problem is the modem or the line between the modem and router.

When the problem is your provider's network

If both your modem and router look normal — all lights solid and steady — but you still cannot reach the internet, the break is somewhere you cannot reach. It is in your provider's equipment, in the line between your house and their equipment, or in their network backbone.

Check your provider's website or app for outage reports. Most providers have a status page that shows whether there is a known outage in your area, when it started, and when they expect to fix it. You can also text your provider's outage number — most providers publish this on their bill or website — and it will tell you whether an outage is affecting your address.

If there is an outage, you have to wait. There is nothing you can do. Your provider's technicians are already working on it. If there is no outage reported, contact your provider's support line. They can see whether your modem is connecting to their network, and they can run tests to find where the break is. They may be able to fix it remotely, or they may need to send a technician to your house.

When the problem is the line between your house and the modem

The physical cable or fiber running from outside your house to your modem can come loose, get damaged, or get wet. If your modem's power light is on but the internet light is red or off, and restarting does not fix it, the problem is likely this line.

Look at where the line enters your house. Is the connector loose? Is the cable visibly damaged — crushed, cut, or frayed? Is there water near it? If you see obvious damage, do not try to fix it yourself. Contact your provider and describe what you see. They own the line and the equipment on both ends, and they are responsible for fixing it.

If the line looks fine, the damage may be outside your house or underground, where you cannot see it. Again, contact your provider. They have equipment that can detect breaks in the line, and they can send a technician to locate and repair it.

Outages that affect your whole neighborhood

Sometimes the internet goes down for everyone on your street or in your neighborhood at once. This is almost always a problem at your provider's equipment — a node that serves multiple homes, or a line that feeds multiple neighborhoods. It is never something you caused, and it is never something you can fix.

When this happens, your provider knows about it. They have monitoring systems that alert them the moment service drops for a group of customers. Check their website or app for an outage notice. If you see one, it will tell you how many customers are affected, when the outage started, and when service is expected to return. If you do not see a notice within a few minutes, contact support and report the outage — this helps them prioritize the problem if they have not detected it yet.

Neighborhood outages usually last anywhere from 30 minutes to several hours, depending on what failed and how straightforward it is to fix. Your provider will update the outage notice as they learn more. You do not need to keep calling — they are working on it, and calling support ties up their lines and slows down the repair.

When you need to contact your provider

Contact your provider if restarting both your modem and router does not restore your internet within 15 minutes, or if your modem's internet light stays red or off after restarting. Have the following information ready: your account number (on your bill), your service address, and a description of what you see on your modem and router lights. If you see an error message on your devices, write it down exactly.

Your provider's support team can see whether your modem is connecting to their network, whether there is an outage in your area, and whether the problem is on their side or yours. They may ask you to restart your equipment again while they watch, or they may run a remote test. If they cannot fix it remotely, they will schedule a technician visit. Most providers offer same-day or next-day appointments for outages.

Frequently Asked Questions

Why does my internet go out for a few seconds at a time?

Brief interruptions usually mean your modem or router is rebooting, or your provider's network is briefly dropping your connection and reconnecting. This happens when equipment overheats, when there is a software glitch, or when the signal on the line is weak. If it happens once a day or less, it is usually not a sign of a serious problem. If it happens many times an hour, contact your provider — the line may be degraded.

Does restarting my modem really take 30 seconds?

Yes. The capacitors inside the modem hold a small charge even after you unplug it. Waiting 30 seconds gives them time to fully discharge. If you plug it back in after just five or ten seconds, the modem may not fully reset, and you will have the same problem. Thirty seconds is the safe minimum.

What if my modem and router are in one box?

Some providers give you a combined modem-router unit instead of two separate devices. The same restart process applies — unplug it, wait 30 seconds, plug it back in. The lights will tell you the same story: power light solid, internet light solid green or blue, WiFi light solid. If all three are solid after three minutes and you still have no internet, the problem is your provider's network.

Can I fix a damaged cable myself?

No. The line from your house to your provider's equipment is their property, and they are responsible for maintaining and repairing it. Tampering with it can damage the signal for your neighbors and may violate your service agreement. If you see damage, contact your provider and let them handle it.

How long do outages usually last?

It varies. A brief glitch in your provider's network might last 30 seconds to a few minutes. A hardware failure at a neighborhood node might take an hour or two to repair. A major fiber cut or equipment failure can take several hours or even a day. Your provider's outage notice will give you an estimate based on what they know about the problem.