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Why Does My Internet or Broadband Keep Disconnecting?

By Paul Snyman · Published · Updated · 7 min read

Few things are more frustrating than an internet (or broadband, if that's what you call it) connection that works for a few minutes, drops out, reconnects, and drops again. Whether it's WiFi, a cable modem, or a DSL line, the cause isn't always obvious - it could be your router, your ISP, WiFi interference, or something else entirely. Here's a systematic approach to finding and fixing intermittent disconnections. If your connection shows as joined but nothing loads at all, rather than dropping intermittently, see our guide to "connected to WiFi but no internet" instead.

Common Causes of Intermittent Disconnections

Internet dropping in and out can have many causes. Understanding the most common ones helps you narrow down the culprit faster.

Router and Modem Issues

Your router is a small computer that runs continuously. Over time, memory leaks, overheated components, or firmware bugs can cause instability. If your router is more than 4-5 years old, age-related hardware degradation is a real possibility.

ISP Problems

Sometimes the problem is upstream. Your ISP's network equipment, a damaged cable in your street, or congestion at peak hours can all cause intermittent outages that look like a local problem. On a DSL line specifically, electrical noise picked up along the copper phone line is a common cause of a connection that drops repeatedly, especially if it happens more during bad weather or at a consistent time of day.

WiFi Interference

WiFi operates on shared radio frequencies. Your neighbours' routers, Bluetooth devices, baby monitors, microwaves, and even USB 3.0 devices can all interfere with your WiFi signal. The 2.4 GHz band is particularly crowded in apartments and dense neighbourhoods.

DNS Failures

If your DNS server is unresponsive, your internet connection is technically still active but nothing loads - because your device can't translate domain names into IP addresses. This feels exactly like a disconnection even though the underlying connection is fine.

Network Overload

Too many devices downloading, streaming, or backing up simultaneously can overwhelm a router or exhaust your bandwidth. Security cameras uploading footage, cloud backups running, and someone streaming 4K can easily saturate a connection.

How to Diagnose the Problem with PingKit

For a drop that only appears every twenty minutes, Guardian's Watch Mode for intermittent drops re-runs the whole diagnostic on a loop for up to an hour while the app is open, then names the segment that failed rather than just the step.

Rather than guessing, use diagnostic tools to identify exactly where the problem is. PingKit gives you several tools specifically designed for this, and the fastest starting point is the one-tap Smart Diagnostics run, which works through the same sequence automatically and names which side of the router the fault is on. For a drop that only happens sometimes, Connection Monitor is the one to leave running, because a test that passes tells you nothing about a fault that was not happening at the time.

PingKit Agent's Timeline on macOS, showing dated entries for a lost and restored internet connection, completed speed tests, and devices joining and leaving the network.
A drop nobody was awake for, caught by a Mac left running: the time it started, the time it came back, and the latency either side.

Connection Monitor: Track Stability Over Time

PingKit's Connection Monitor pings a reliable server in real time and graphs the results live while the app is open. Keep it in the foreground and watch the live graph and stability score - you'll see exactly when a disconnection happens and how long it lasts. For unattended tracking over hours or days, run Guardian's Mac Agent instead, which can watch your connection continuously from a Mac.

Pro tip: Run Connection Monitor while connected to your router via different methods. If drops happen on WiFi but not when you're near the router, the issue is signal strength. If they happen everywhere, the problem is the router or ISP.

Ping: Check for Packet Loss

Open PingKit's Ping tool and ping your router's gateway address (shown in My Network). If you see packet loss to your own router, the issue is between your phone and the router - typically WiFi interference or a router hardware problem.

Then ping an external server like 1.1.1.1 (Cloudflare). If you get packet loss to external servers but not to your router, the problem is between your router and the internet - likely an ISP issue.

MTR: Find Where the Problem Is

MTR combines traceroute with continuous ping to show packet loss and latency at every hop between you and a destination. Run an MTR to a reliable server like 1.1.1.1 and look for where packet loss begins:

Speed Test: Measure Bandwidth

Run speed tests at different times of day. If speeds are normal in the morning but terrible in the evening, ISP congestion is likely. If speeds are consistently low, there may be a physical line issue or a plan limitation you've forgotten about.

A drop you can describe is a drop somebody can fix. The tool that records one while you watch, with the timeouts drawn on the graph rather than missing from it, is Connection Monitor App for iPhone

Fixing the Problem

Quick Fixes to Try First

  1. Restart your router and modem - unplug both for 30 seconds, plug the modem in first, wait for it to fully connect, then plug in the router
  2. Check for overheating - if your router is hot to the touch, move it to a well-ventilated spot
  3. Update firmware - log into your router's admin panel and check for available updates
  4. Switch WiFi channels - if you're on a congested channel, switching can dramatically improve stability
  5. Change DNS servers - switch to Cloudflare (1.1.1.1) or Google (8.8.8.8) to rule out DNS-related drops

If the Router Is the Problem

If the ISP Is the Problem

When your diagnostics point to the ISP, gather your evidence before calling support:

This data transforms a "my internet keeps dropping" call into a factual, evidence-backed report. ISP support teams take these reports more seriously because you've already done the troubleshooting they would ask you to do.

Already shipped: PingKit Guardian includes a free Mac Agent with Uptime Watch, which checks a target you choose (your router, a self-hosted service, anything with a URL) once an hour and pushes a notification to your iPhone the moment it goes down or comes back, even while the Agent runs quietly in the menu bar. That state-change history is useful evidence when dealing with an unreliable ISP.

When to Call a Technician

If you've tried everything above and the problem persists, there may be a physical issue that needs professional attention:

Ask your ISP to send a technician to test the line at your premises. Have your PingKit diagnostic data ready to show them where the problem is occurring.

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