How do I clear the DNS cache?


If you ever need to set custom DNS or change the DNS settings on iOS devices for using an alternate domain name server or a faster one, you’ll probably want the DNS changes to take effect immediately, which requires the flushing of DNS caches on the iPhone or iPad. There are actually several ways to perform a DNS flush on an iOS device, we’ll cover the two fastest methods below, the first is preferential because it has the least amount of impact overall to other activity on the device as it does not require a reboot.

Keep in mind these methods work the same for all iPhone, iPad, and iPod touch devices, though the Airplane Mode approach works particularly well with iPhone and cellular equipped iPad devices.

Flush DNS Cache on iPhone / iPad with AirPlane Mode Toggle

By far the simplest way to clear out the DNS caches on the iPhone is to simply toggle Airplane mode ON and back OFF again. This is easily done by using the simple airplane switch from within the...

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Internet connection problems? DNS cache corrupted? Maybe you need to flush Windows DNS Cache. If your computer is finding it difficult to reach a certain web site or server, the problem may be due to a corrupt local DNS cache. Sometimes bad results are cached, maybe due to DNS Cache Poisoning and Spoofing, and therefore need to be cleared from the cache in order to allow your Windows computer to communicate with the host correctly.

Typically, there are 3 types of caches in Windows which you can flush easily:

Memory Cache DNS Cache Thumbnails Cache

Clearing the Memory Cache can free up some system memory while clearing the Thumbnail Cache can free up space in your hard disk. Clearing the DNS Cache can fix your internet connection problem. Here’s how you can flush the DNS cache in Windows 8 or Windows 7.

Flush Windows DNS Cache

You need to open an administrative command prompt windows. In Windows 8, to do so, Press Win+C in combination to bring...

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DNS resolves domain names to IP addresses so people don't have to remember a series of numbers (IP addresses) when navigating to a website. In order to speed up requests and reduce queries to DNS servers, most operating systems cache (temporarily save) DNS lookups locally. If you need to clear that cache (in order to see changes, this article will walk you through how to do that for these different operating systems: Windows, MacOS, and Linux. The process is generally referred to as clearing or flushing local DNS cache.

Clearing Local DNS Cache in Windows

Bring up a command line window, depending on your version of Windows, this will be done in one of the following ways:

Windows 7 and Vista: Click on the Start Menu Type cmd in the search box Right click on cmd in the Programs search result and choose Run as administrator Windows 98/NT/2000/XP Click on the Start Menu Select run Type or select cmd to open the command line window

Once you...

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This is my attempt to help bcrouch5 and ramirgl.

The failure with "ipconfig" command on your computer is due to security restrictions on your account or computer. Most likely your computer was purchased and setup by another person with the privileges to maintain the computer. This is a protection mechanism to keep novice users from harming their own computer.

Your windows computer has several user accounts and you are using an account that does not have the security privileges that are needed to run "ipconfig". Right click "run as admin" will fail until you logout and logon as an admin user.


a) avoid using ipconfig and istead reboot. Just reboot the phone, ipad, tablet, or computer. In most cases a full restart will flush the DNS cache.

b) call a friend who knows windows and networking and can help you and explain this

b) Use another account on your computer and then use ipconfig. Go to your control panel , then users,...

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To clear the DNS Forwarder cache, restart the dnsmasq daemon as follows:

Click Status > Services Find dnsmasq in the list Click , or stop the service using then start again with .

Restarting the daemon will clear the internal cache, but the client PCs may still have cached entries. The DNS cache on a Windows PC may be cleaned from a command prompt or Start > Run:

ipconfig /flushdns

This may need to be executed from an Administrator command prompt on Windows Vista and later.

Other operating systems will surely have other means to clear the DNS resolver cache. For example, Ubuntu-based distributions also use dnsmasq, and it may be restarted using:

sudo service network-manager restart

Browsers also have their own internal DNS caches separate from the OS. Close and re-open the browser if none of the above help.

As a last resort, rebooting/restarting a client will surely clear any locally cached...

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If you are having problems on your PC, Laptop or Server getting to a website or another address then your support department may often ask if you have “flushed your DNS cache”. When you go to a website it has two addresses, its domain name i.e.. and its IP address i.e.., these details are cached to save time looking up the location of the website next time you need to visit.

Occasionally websites and other resources on your network need to change their IP addresses, so when you go to them via the host name ( you cannot get to them because your device has cached the details it needs to get to them. We can quickly resolve this problem by flushing the DNS cache. Obviously there are many different flavours of OS, below I go through the commands on a few of them.

Flush DNS Cache on Windows Server and OS

This is a simple command and is ran from command line.

ipconfig /flushdns

Flush DNS Cache OSX Mountain Lion and Lion

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The following guide will walk you through clearing your DNS Cache. Every time you venture onto the Internet, DNS resolutions are being made and your computer stores many of them. Caching these resolutions can speed up your web activities because your computer no longer has to ask another computer where something is located.

Eventually there will come a time when a bad entry is stored. There are generally two ways to remove these entries. First is to allow 24 hours to pass. During this time your computer will seek out and make the necessary DNS updates. Second is to flush your DNS cache.

The first step to flushing your DNS, is to open your “Windows Command” prompt.

WinXP: Start, Run and then type “cmd” and press Enter. Vista, Window 7 and Windows 8: Click “Start” and type the word “Command” in the Start search field. Finally right click the command prompt icon and select the option to “Run as Administrator”. In the open prompt, type “ipconfig /flushdns” (without...
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Cached DNS entries can be cleared using the Windows Command Prompt, improving website load times and resolving issues preventing access to specific websites.

Clearing your DNS cache can improve website loading times and resolve issues that prevent access to specific websites. Cached DNS entries can be cleared using the Windows Command Prompt.

Step 1

Press Win-C to open the Charms Bar and type cmd into the Search bar. Right-click the Command Prompt icon and select Run as Administrator.

Step 2

Type ipconfig /displaydns in the Command Prompt window to view list of DNS entries stored in cache.

Step 3

Type ipconfig /flushdns to clear cache. Wait for the message "Successfully flushed the DNS Resolver Cache" to display. This can take several seconds, depending on the size of the cache.

Step 4

Type ipconfig /displaydns once more to confirm that cached DNS entries are no longer...

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Command to reset, flush or clear your DNS cache.

Vista, Windows 7, and WIndows 8

These same directions work in versions of Windows after XP; however, you’ll need to gain admin privileges first:
Vista, Windows 7, and Windows 8 directions for flushing the dns cache.


XP remembers negative (DNS unable to resolve) entries for a few minutes. Often this can be a pain when moving and debugging sites. As long as that negative entry sits in your DNS cache, your box will continue to give you a cannot find server error. By cleaning out your DNS cache, you can fix this problem.

Rebooting will flush your cache… but there is an easier way.

Drop to a command box and type:

ipconfig /flushdns

If you wish to stop XP from placing negative entries into cache, you can make this change in your registry.

1. Goto HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ Dnscache\Parameters
2. Build a new DWORD value called...

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In this tutorial:

DNS resolves domain name to IP addresses so people do not have to remember a series of numbers (IP addresses) when trying to visit a website. In order the speed up this process and reduce the traffic on the DNS servers, most computer operating systems will store or cache DNS lookups on your computer locally. At times, you may need to clear the cache to see changes . In this tutorial, we'll show you how to clear the DNS cache for the major operating systems on the market. Typically, this process is referred to as clearing or flushing the local DNS cache.

Flushing Local DNS Cache in Windows

Open the command line window, and depending on your version of Windows, this can be done in one of the following ways:

Windows 7 and Vista: Click on the Start Menu Type cmd in the search box Right click on cmd in the programs search results and choose Run as Administrator Windows 98/NT/2000/XP Click on the...
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Most operating systems and DNS clients will automatically cache IP addresses and other DNS results, this is done in order to speed up subsequent requests to the same hostname. Sometimes bad results will be cached and therefore need to be cleared from the cache in order for you to communicate with the host correctly. All major operating systems allow you to force this process. Outlined below are the common steps you will need to follow in order to flush your DNS cache.

Microsoft Windows

Windows 10

Flushing the DNS cache on Windows 10 is a very easy process. Due to system security permissions, you must ensure that you run the command prompt as an administrator user.

Ensure that you're on the Windows 10 desktop. Right click on the start menu and choose Command Prompt (Admin) from the menu. Type in the command ipconfig /flushdns

Windows 8 / Windows 8.1

Flushing the DNS cache on Windows 8 and Windows 8.1 is a very easy process. Due to system...

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There're also apps like Internet Booster promising to "clear DNS cache" (amongst other things). I didn't try it out myself, and furthermore there seems no way to do only that (just one "optimize" button which "applies improvements"); also its effects might differ between devices (says the app's description) -- but it might be better than a reboot. Btw: while not mentioning root as requirement, it might still be needed.

There are several "similar apps" listed on Google Play -- but be aware that most of them include Airpush ads and/or want excessive permissions, which is why I didn't name them here.

Another possible solution (not tested by myself) I found at MadPC, seemingly quoting user8522's answer before stating:

The last option but most intensive on the user themselves unless they want to just wait the update out: Have your users go into settings -> applications -> Network Location -> Clear data

Another short howto mentions a different easy way to...

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Cache stored on Windows 10 retards your PC from working with its efficiency. PC starts showing various kinds of issues due to this like it becomes slower, hangs time and again, starts in a longer period of time, the browser shows web pages opened in the last session and even more. You can clear cache on Windows 10 PC after putting a small effort to run your PC with perfection. So we are writing here How to Clear Cache on Windows 10.


How to Clear Cache on Windows 10 OS

On any operating System like Windows 10, Many types of cache exist. It is distributed on your PC in two different environments desktop and the Modern UI. We call them Desktop app cache, Modern UI App cache which are found in Internet Explorer, Windows Store cache, File Explorer History, Location History. In these Windows 10 tips, we would elaborate to clear cache on Windows 10 one by one.

1. How to Remove Desktop Apps Cache on Windows 10

Via Ccleaner

1. Firstly,...

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CCleaner - Clean temporary files, optimize & speed up your computer with the world's leading PC Cleaner'

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